WordNet
- any disease of the throat or fauces marked by spasmodic attacks of intense suffocative pain
- of or related to the pain of angina pectoris (同)anginose, anginous
PrepTutorEJDIC
- アンギナ(のどの炎症に関する諸病気) / =angina pectoris
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出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2017/11/07 09:31:09」(JST)
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For other uses, see Angina (disambiguation).
| Angina | |
|---|---|
| Synonyms | Angina pectoris |
| Diagram of discomfort caused by coronary artery disease. Pressure, fullness, squeezing or pain in the center of the chest. Can also feel discomfort in the neck, jaw, shoulder, back or arm | |
| Pronunciation |
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| Specialty | Cardiology |
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[edit on Wikidata]
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Angina, also known as angina pectoris, is chest pain or pressure, usually due to not enough blood flow to the heart muscle.
Angina is usually due to obstruction or spasm of the coronary arteries.[1] Other causes include anemia, abnormal heart rhythms, and heart failure. The main mechanism of coronary artery obstruction is an atherosclerosis. The term derives from the Latin angere ("to strangle") and pectus ("chest"), and can therefore be translated as "a strangling feeling in the chest".
There is a weak relationship between severity of pain and degree of oxygen deprivation in the heart muscle (i.e., there can be severe pain with little or no risk of a myocardial infarction (heart attack) and a heart attack can occur without pain). In some cases, angina can be quite severe, and in the early 20th century this was a known sign of impending death.[2] However, given current medical therapies, the outlook has improved substantially. People with an average age of 62 years, who have moderate to severe degrees of angina (grading by classes II, III, and IV) have a 5-year survival rate of approximately 92%.[3]
Worsening angina attacks, sudden-onset angina at rest, and angina lasting more than 15 minutes are symptoms of unstable angina (usually grouped with similar conditions as the acute coronary syndrome). As these may precede a heart attack, they require urgent medical attention and are, in general, treated in similar fashion to myocardial infarction.
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Video explanation
Contents
- 1 Classification
- 1.1 Stable angina
- 1.2 Unstable angina
- 1.3 Cardiac syndrome X
- 2 Signs and symptoms
- 3 Cause
- 3.1 Major risk factors
- 3.2 Other medical problems
- 3.3 Other cardiac problems
- 4 Pathophysiology
- 5 Diagnosis
- 6 Treatment
- 6.1 Microvascular angina in women
- 6.2 Suspected angina
- 7 Epidemiology
- 8 History
- 9 References
- 10 External links
Classification
Illustration depicting angina
Stable angina
Also known as 'effort angina', this refers to the classic type of angina related to myocardial ischemia. A typical presentation of stable angina is that of chest discomfort and associated symptoms precipitated by some activity (running, walking, etc.) with minimal or non-existent symptoms at rest or after administration of sublingual nitroglycerin.[4] Symptoms typically abate several minutes after activity and recur when activity resumes. In this way, stable angina may be thought of as being similar to intermittent claudication symptoms. Other recognized precipitants of stable angina include cold weather, heavy meals, and emotional stress.
Unstable angina
Unstable angina (UA) (also "crescendo angina"; this is a form of acute coronary syndrome) is defined as angina pectoris that changes or worsens.[5]
It has at least one of these three features:
- it occurs at rest (or with minimal exertion), usually lasting more than 10 minutes
- it is severe and of new onset (i.e., within the prior 4–6 weeks)
- it occurs with a crescendo pattern (i.e., distinctly more severe, prolonged, or frequent than before).
UA may occur unpredictably at rest, which may be a serious indicator of an impending heart attack. What differentiates stable angina from unstable angina (other than symptoms) is the pathophysiology of the atherosclerosis. The pathophysiology of unstable angina is the reduction of coronary flow due to transient platelet aggregation on apparently normal endothelium, coronary artery spasms, or coronary thrombosis.[6][7] The process starts with atherosclerosis, progresses through inflammation to yield an active unstable plaque, which undergoes thrombosis and results in acute myocardial ischemia, which, if not reversed, results in cell necrosis (infarction).[7] Studies show that 64% of all unstable anginas occur between 22:00 and 08:00 when patients are at rest.[7][8]
In stable angina, the developing atheroma is protected with a fibrous cap. This cap may rupture in unstable angina, allowing blood clots to precipitate and further decrease the area of the coronary vessel's lumen. This explains why, in many cases, unstable angina develops independently of activity.[7]
Cardiac syndrome X
Main article: Cardiac syndrome X
Cardiac syndrome X, sometimes known as microvascular angina is characterized by angina-like chest pain, in the context of normal epicardial coronary arteries (the largest vessels on the surface of the heart, prior to significant branching) on angiography. The original definition of cardiac syndrome X also mandated that ischemic changes on exercise (despite normal coronary arteries) were displayed, as shown on cardiac stress tests.[9] The primary cause of cardiac syndrome X is unknown, but factors apparently involved are endothelial dysfunction and reduced flow (perhaps due to spasm) in the tiny "resistance" blood vessels of the heart.[10] Since microvascular angina is not characterized by major arterial blockages, it is harder to recognize and diagnose.[11][12][13] Microvascular angina was previously considered a rather benign condition, but more recent data has changed this attitude. Studies, including the Women's Ischemia Syndrome Evaluation (WISE), suggest that microvascular angina is part of the pathophysiology of ischemic heart disease, perhaps explaining the higher rates of angina in women than in men, as well as their predilection towards ischemia and acute coronary syndromes in the absence of obstructive coronary artery disease.[14]
Signs and symptoms
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Angina pectoris can be quite painful, but many patients with angina complain of chest discomfort rather than actual pain: the discomfort is usually described as a pressure, heaviness, tightness, squeezing, burning, or choking sensation. Apart from chest discomfort, anginal pains may also be experienced in the epigastrium (upper central abdomen), back, neck area, jaw, or shoulders. This is explained by the concept of referred pain, and is due to the fact that the spinal level that receives visceral sensation from the heart simultaneously receives cutaneous sensation from parts of the skin specified by that spinal nerve's dermatome, without an ability to discriminate the two. Typical locations for referred pain are arms (often inner left arm), shoulders, and neck into the jaw. Angina is typically precipitated by exertion or emotional stress. It is exacerbated by having a full stomach and by cold temperatures. Pain may be accompanied by breathlessness, sweating, and nausea in some cases. In this case, the pulse rate and the blood pressure increases. Chest pain lasting only a few seconds is normally not angina (such as precordial catch syndrome).
Myocardial ischemia comes about when the myocardium (the heart muscle) receives insufficient blood and oxygen to function normally either because of increased oxygen demand by the myocardium or because of decreased supply to the myocardium. This inadequate perfusion of blood and the resulting reduced delivery of oxygen and nutrients are directly correlated to blocked or narrowed blood vessels.
Some experience "autonomic symptoms" (related to increased activity of the autonomic nervous system) such as nausea, vomiting, and pallor.
Major risk factors for angina include cigarette smoking, diabetes, high cholesterol, high blood pressure, sedentary lifestyle, and family history of premature heart disease.
A variant form of angina—Prinzmetal's angina—occurs in patients with normal coronary arteries or insignificant atherosclerosis. It is believed caused by spasms of the artery. It occurs more in younger women.[15]
Coital angina, also known as angina d'amour, is angina subsequent to sexual intercourse.[16] It is generally rare, except in patients with severe coronary artery disease.[16]
Cause
Major risk factors
[citation needed]
- Age (≥ 45 years for men, ≥ 55 for women)
- Smoking
- Diabetes mellitus
- Dyslipidemia
- Family history of premature cardiovascular disease (men <55 years, female <65 years old)
- Hypertension
- Kidney disease (microalbuminuria or GFR<60 mL/min)
- Obesity (BMI ≥ 30 kg/m2)
- Physical inactivity
- Prolonged psychosocial stress[17]
Routine counselling of adults to advise them to improve their diet and increase their physical activity has not been found to significantly alter behaviour, and thus is not recommended.[18]
- Conditions that exacerbate or provoke angina
- [19]
- Medications
- Vasodilators
- Excessive thyroid hormone replacement
- Vasoconstrictors
- Polycythemia, which thickens the blood, slowing its flow through the heart muscle
- Hypothermia
- Hypervolemia
- Hypovolemia
One study found that smokers with coronary artery disease had a significantly increased level of sympathetic nerve activity when compared to those without. This is in addition to increases in blood pressure, heart rate, and peripheral vascular resistance associated with nicotine, which may lead to recurrent angina attacks. In addition, the Centers for Disease Control and Prevention (CDC) reports that the risk of CHD (Coronary heart disease), stroke, and PVD (Peripheral vascular disease) is reduced within 1–2 years of smoking cessation. In another study, it was found that, after one year, the prevalence of angina in smoking men under 60 after an initial attack was 40% less in those having quit smoking compared to those that continued. Studies have found that there are short-term and long-term benefits to smoking cessation.[20][21][22][23]
Other medical problems
- Esophageal disorders
- Gastroesophageal Reflux Disease (GERD)
- Hyperthyroidism
- Hypoxemia
- Profound anemia
- Uncontrolled hypertension
Other cardiac problems
- Bradyarrhythmia
- Hypertrophic cardiomyopathy
- Tachyarrhythmia
- Valvular heart disease[24][25]
Myocardial ischemia can result from:
- a reduction of blood flow to the heart that can be caused by stenosis, spasm, or acute occlusion (by an embolus) of the heart's arteries.
- resistance of the blood vessels. This can be caused by narrowing of the blood vessels; a decrease in radius.[26] Blood flow is proportional to the radius of the artery to the fourth power.[27]
- reduced oxygen-carrying capacity of the blood, due to several factors such as a decrease in oxygen tension and hemoglobin concentration.[28] This decreases the ability of hemoglobin to carry oxygen to myocardial tissue.[29]
Atherosclerosis is the most common cause of stenosis (narrowing of the blood vessels) of the heart's arteries and, hence, angina pectoris. Some people with chest pain have normal or minimal narrowing of heart arteries; in these patients, vasospasm is a more likely cause for the pain, sometimes in the context of Prinzmetal's angina and syndrome X.
Myocardial ischemia also can be the result of factors affecting blood composition, such as reduced oxygen-carrying capacity of blood, as seen with severe anemia (low number of red blood cells), or long-term smoking.
Pathophysiology
Angina results when there is an imbalance between the heart's oxygen demand and supply. This imbalance can result from an increase in demand (e.g., during exercise) without a proportional increase in supply (e.g., due to obstruction or atherosclerosis of the coronary arteries).
However, the pathophysiology of angina in females varies significantly as compared to males.[30] Non-obstructive coronary disease is more common in females.[31][32]
Diagnosis
Angina should be suspected in people presenting tight, dull, or heavy chest discomfort that is:[33]
- Retrosternal or left-sided, radiating to the left arm, neck, jaw, or back.
- Associated with exertion or emotional stress and relieved within several minutes by rest.
- Precipitated by cold weather or a meal.
Some people present with atypical symptoms, including breathlessness, nausea, or epigastric discomfort or burning. These atypical symptoms are particularly likely in older people, women, and those with diabetes.[33]
Anginal pain is not usually sharp or stabbing or influenced by respiration. Antacids and simple analgesics do not usually relieve the pain. If chest discomfort (of whatever site) is precipitated by exertion, relieved by rest, and relieved by glyceryl trinitrate, the likelihood of angina is increased.[33]
In angina patients momentarily not feeling any chest pain, an electrocardiogram (ECG) is typically normal unless there have been other cardiac problems in the past. During periods of pain, depression, or elevation of the ST segment may be observed. To elicit these changes, an exercise ECG test ("treadmill test") may be performed, during which the patient exercises to his/her maximum ability before fatigue, breathlessness, or pain intervenes; if characteristic ECG changes are documented (typically more than 1 mm of flat or downsloping ST depression), the test is considered diagnostic for angina. Even constant monitoring of the blood pressure and the pulse rate can lead to some conclusion regarding angina. The exercise test is also useful in looking for other markers of myocardial ischemia: blood pressure response (or lack thereof, in particular, a drop in systolic blood pressure), dysrhythmia and chronotropic response. Other alternatives to a standard exercise test include a thallium scintigram or sestamibi scintigram (in patients unable to exercise enough for the purposes of the treadmill tests, e.g., due to asthma or arthritis or in whom the ECG is too abnormal at rest) or Stress Echocardiography.
In patients in whom such noninvasive testing is diagnostic, a coronary angiogram is typically performed to identify the nature of the coronary lesion, and whether this would be a candidate for angioplasty, coronary artery bypass graft (CABG), treatment only with medication, or other treatments. In hospitalized patients with unstable angina (or the newer term of "high-risk acute coronary syndromes"), those with resting ischaemic ECG changes or those with raised cardiac enzymes such as troponin may undergo coronary angiography directly.
Treatment
The most specific medicine to treat angina is nitroglycerin. It is a potent vasodilator that decreases myocardial oxygen demand by decreasing the heart's workload. Beta blockers and calcium channel blockers act to decrease the heart's workload, and thus its requirement for oxygen. Nitroglycerin should not be given if certain inhibitors such as sildenafil, tadalafil, or vardenafil have been taken within the previous 12 hours as the combination of the two could cause a serious drop in blood pressure. Treatments for angina are balloon angioplasty, in which the balloon is inserted at the end of a catheter and inflated to widen the arterial lumen. Stents to maintain the arterial widening are often used at the same time. Coronary bypass surgery involves bypassing constricted arteries with venous grafts. This is much more invasive than angioplasty.
The main goals of treatment in angina pectoris are relief of symptoms, slowing progression of the disease, and reduction of future events, especially heart attacks and death. Beta blockers (e.g., carvedilol, propranolol, atenolol) have a large body of evidence in morbidity and mortality benefits (fewer symptoms, less disability and longer life) and short-acting nitroglycerin medications have been used since 1879 for symptomatic relief of angina.[34] Calcium channel blockers (such as nifedipine (Adalat) and amlodipine), isosorbide mononitrate and nicorandil are vasodilators commonly used in chronic stable angina.[citation needed] A new therapeutic class, called If inhibitor, has recently been made available: Ivabradine provides pure heart rate reduction[35] leading to major anti-ischemic and antianginal efficacy. ACE inhibitors are also vasodilators with both symptomatic and prognostic benefit. Statins are the most frequently used lipid/cholesterol modifiers, which probably also stabilize existing atheromatous plaque.[citation needed] Low-dose aspirin decreases the risk of heart attack in patients with chronic stable angina, and was part of standard treatment. However, in patients without established cardiovascular disease, the increase in hemorrhagic stroke and gastrointestinal bleeding offsets any benefits and it is no longer advised unless the risk of myocardial infarction is very high.[36]
Exercise is also a very good long-term treatment for the angina (but only particular regimens - gentle and sustained exercise rather than intense short bursts),[37] probably working by complex mechanisms such as improving blood pressure and promoting coronary artery collateralisation.
Though sometimes used by patients, evidence does not support the use of Traditional Chinese Herbal Products (THCP) for angina[38]
Identifying and treating risk factors for further coronary heart disease is a priority in patients with angina. This means testing for elevated cholesterol and other fats in the blood, diabetes and hypertension (high blood pressure), and encouraging smoking cessation and weight optimization.
The calcium channel blocker nifedipine prolongs cardiovascular event- and procedure-free survival in patients with coronary artery disease. New overt heart failures were reduced by 29% compared to placebo; however, the mortality rate difference between the two groups was statistically insignificant.[39]
Microvascular angina in women
Aggressive risk factor modification is required for effective treatment of microvascular angina where exercise plays a major role.[40] Several other treatment strategies including b-blockers, angiotensin-converting enzyme inhibitors, ranolazine, l-arginine, statin drugs and potentially estrogen replacement therapy have been shown to relieve anginal symptoms as well as improve vascular function.[40] Nitrates may be effective for symptom relief.[40] Further studies are required to determine whether specific treatments are associated with improved survival as well as decreased symptoms.
Suspected angina
Hospital admission for people with the following symptoms is recommended, as they may have unstable angina: pain at rest (which may occur at night), pain on minimal exertion, angina that seems to progress rapidly despite increasing medical treatment. All people with suspected angina should be urgently referred to a chest pain evaluation service, for confirmation of the diagnosis and assessment of the severity of coronary heart disease.[41]
Epidemiology
As of 2010, angina due to ischemic heart disease affects approximately 112 million people (1.6% of the population) being slightly more common in men than women (1.7% to 1.5%).[42]
In the United States, 10.2 million are estimated to experience angina with approximately 500,000 new cases occurring each year.[4][43] Angina is more often the presenting symptom of coronary artery disease in women than in men. The prevalence of angina rises with increasing age, with a mean age of onset of 62.3 years.[44] After five years post-onset, 4.8% of individuals with angina subsequently died from coronary heart disease. Men with angina were found to have an increased risk of subsequent acute myocardial infarction and coronary heart disease related death than women. Similar figures apply in the remainder of the Western world. All forms of coronary heart disease are much less-common in the Third World, as its risk factors are much more common in Western and Westernized countries; it could, therefore, be termed a disease of affluence. The adoption of a rich, Westernized diet and subsequent increase of smoking, obesity, and other risk factors has led to an increase in angina and related diseases in countries such as China.
History
The condition was named "hritshoola" in ancient India and was described by Sushruta (6th century BC).[45]
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- ^ Buckley, B. S; Simpson, C. R; McLernon, D. J; Murphy, A. W; Hannaford, P. C (2009). "Five year prognosis in patients with angina identified in primary care: Incident cohort study". BMJ. 339: b3058. PMC 2722695 . PMID 19661139. doi:10.1136/bmj.b3058.
- ^ Dwivedi, Girish; Dwivedi, Shridhar (2007). "Sushruta – the Clinician – Teacher par Excellence" (PDF). The Indian Journal of Chest Diseases and Allied Sciences. 49: 243–4. Archived from the original (PDF) on 2008-10-10.
External links
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- Treatment of stable angina recommendations for patients in layman terms
- British Heart Foundation - Angina
- Angina Pectoris Animation Video 3D
- Guidelines on the management of stable angina pectoris - European Society of Cardiology
- Heart Attack and Angina Statistics by American Heart Association : Final 2006 statistics for the United States
Symptoms and signs relating to the cardiovascular system (R00–R03, 785)
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Cardiovascular disease (heart) (I00–I52, 390–429)
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UpToDate Contents
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- 1. 狭心症：心筋虚血による胸痛 angina pectoris chest pain caused by myocardial ischemia
- 2. 安定した虚血性心疾患：ケアの概要 stable ischemic heart disease overview of care
- 3. 狭心症の新しい治療法 new therapies for angina pectoris
- 4. 安定狭心症のマネージメントにおけるβ遮断剤 beta blockers in the management of stable angina pectoris
- 5. 心臓症候群X：正常冠動脈の狭心症 cardiac syndrome x angina pectoris with normal coronary arteries
English Journal
- The MHC2TA 1614 C>G gene polymorphism is associated with risk of developing acute coronary syndrome.
- Vargas-Alarcón G, Martínez-Ríos MA, Peña-Duque MA, Posadas-Romero C, Cardoso-Saldaña G, Vallejo M, Ramírez-Bello J, Pérez-Méndez O, Fragoso JM.SourceDepartment of Molecular Biology, Instituto Nacional de Cardiología Ignacio Chávez, Mexico City, Mexico.
- Molecular immunology.Mol Immunol.2013 Oct;55(3-4):424-8. doi: 10.1016/j.molimm.2013.02.007. Epub 2013 Mar 16.
- BACKGROUND: Inflammation plays an essential role in the development and progression of atherosclerotic lesions. The major histocompatibility complex class II trans-activator (MHC2TA) is considered an important molecule in the inflammatory process regulation. The aim of the present study was to evalu
- PMID 23511026
- Prognostic value of cardiovascular disease status: the Leiden 85-plus study.
- van Peet PG, Drewes YM, de Craen AJ, Westendorp RG, Gussekloo J, de Ruijter W.SourceDepartment of Public Health and Primary Care, Leiden University Medical Center, Postzone V0-P, P.O. Box 9600, 2300 RC, Leiden, The Netherlands, P.G.van_Peet@lumc.nl.
- Age (Dordrecht, Netherlands).Age (Dordr).2013 Aug;35(4):1433-44. doi: 10.1007/s11357-012-9443-5. Epub 2012 Jul 4.
- This study aimed to explore the prognosis of very old people depending on their cardiovascular disease (CVD) history. This observational prospective cohort study included 570 participants aged 85 years from the general population with 5-year follow-up for morbidity, functional status, and mortality
- PMID 22760858
- Everolimus-induced Pneumonitis after Drug-eluting Stent Implantation: A Case Report.
- Sakamoto S, Kikuchi N, Ichikawa A, Sano G, Satoh K, Sugino K, Isobe K, Takai Y, Shibuya K, Homma S.SourceDepartment of Respiratory Medicine, Toho University School of Medicine, Tokyo, Japan, susumu1029@gmail.com.
- Cardiovascular and interventional radiology.Cardiovasc Intervent Radiol.2013 Aug;36(4):1151-4. doi: 10.1007/s00270-012-0477-y. Epub 2012 Sep 15.
- Despite the wide use of everolimus as an antineoplastic coating agent for coronary stents to reduce the rate of restenosis, little is known about the health hazards of everolimus-eluting stents (EES). We describe a case of pneumonitis that developed 2 months after EES implantation for angina. Lung
- PMID 22983698
Japanese Journal
- Assessment of the Anti-anginal Effect of Tetramethylpyrazine Using Vasopressin-Induced Angina Model Rats
- Biological & pharmaceutical bulletin 39(8), 1370-1373, 2016-08
- NAID 40020899636
- 症例 アレルギー反応が原因と思われるステント内再狭窄症に対する冠状動脈バイパス術の1例
- 胸部外科 = The Japanese journal of thoracic surgery 69(7), 545-547, 2016-07
- NAID 40020889518
- Japanese postmarketing surveillance of clopidogrel in patients with non-ST-segment elevation acute coronary syndrome, stable angina, old myocardial infarction, and ST-segment elevation myocardial infarction after percutaneous coronary intervention in a real-life setting : the final report (J-PLACE Final)
- Cardiovascular intervention and therapeutics 31(2), 101-113, 2016-04
- NAID 40020789655
Related Links
- Angina (an-JI-nuh or AN-juh-nuh) is chest pain or discomfort that occurs if an area of your heart muscle doesn't get enough oxygen-rich blood. Angina may feel like pressure or squeezing in your chest. The pain also can occur in your ...
- Read about angina pectoris pain, treatment, symptoms, angina attacks, medication, types, causes, and more. Read about the different types of angina (printzmetal, stable, unstable, variant, acute, vasospastic, microvascular). ... The ...
Related Pictures
★リンクテーブル★
| リンク元 | 「ヘルパンギーナ」「anginal」「アンギナ」「stenocardia」「cardiac angina」 |
| 拡張検索 | 「angina at rest」「stable angina pectoris」 |
| 関連記事 | 「angi」 |
「ヘルパンギーナ」
概念
- 病原体としてコクサッキーウイルスA群(group A coxsackieviruses)がある。
疫学
- 4歳以下が多く、特に1歳に多い。
病原体
- エンテロウイルス属(コクサッキーウイルスA群2,4,5,6,8,10) (IRE.765)
潜伏期
- 2-4日ないし2-7日
症状
- 発熱、哺乳低下、流涎、咽頭痛、嚥下困難
身体所見
- 口腔内：灰白色の丘疹と水疱が扁桃腺の前部、軟口蓋、口蓋に認められる。 (IRE.765)
経過
- 4-5日の経過で消失
参考
- 1. [charged] 小児における口腔軟部組織病変 - uptodate [1]
- 2. [charged] エンテロウイルスとパラエコーウイルス感染症の臨床症状と診断 - uptodate [2]
「anginal」
- adj.
- 狭心症の、アンギナの
「アンギナ」
- 英
- angina
「stenocardia」
「cardiac angina」
「angina at rest」
「stable angina pectoris」
「angi」
- comb form.
- 血管、リンパ管、血管腫、果皮