洞性徐脈
WordNet
- commit a sin; violate a law of God or a moral law (同)transgress, trespass
- violent and excited activity; "they began to fight like sin" (同)hell
- estrangement from god (同)sinfulness, wickedness
- an act that is regarded by theologians as a transgression of Gods will (同)sinning
- the 21st letter of the Hebrew alphabet
- any of various air-filled cavities especially in the bones of the skull
- abnormally slow heartbeat
PrepTutorEJDIC
- 〈U〉(宗教・道徳上の)『罪』 / 〈C〉(宗教・道徳上の)『罪の行為』,罪悪 / 〈C〉《特におどけて》違反(過失)の行為 / (宗教・道徳上の)おきてを破る,罪を犯す / (…に)違反(過失)をする,背く《+『against』+『名』》
- sine
- 洞(どう)(骨や組織の中の穴・くぼみなど);静脈洞
Wikipedia preview
出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2015/05/18 23:57:06」(JST)
[Wiki en表示]
Sinus bradycardia
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Sinus bradycardia seen in lead II with a heart rate of about 50.
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| ICD-9 |
427.81 |
| MeSH |
D001146 |
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This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. (August 2014) |
Sinus bradycardia is a heart rhythm that originates from the sinus node and has a rate that is lower than normal. In humans, bradycardia is generally defined to be a rate of under 60 beats per minute.
Contents
- 1 Signs and symptoms
- 2 Causes
- 3 Diagnosis
- 4 See also
- 5 References
Signs and symptoms
The decreased heart rate can cause a decreased cardiac output resulting in symptoms such as lightheadedness, dizziness, hypotension, vertigo, and syncope. The slow heart rate may also lead to atrial, junctional, or ventricular ectopic rhythms.
Bradycardia is not necessarily problematic. People who regularly practice sports may have sinus bradycardia, because their trained hearts can pump enough blood in each contraction to allow a low resting heart rate. Sinus bradycardia can also be an adaptive advantage; for example, diving seals may have a heart rate as low as 12 beats per minute, helping them to conserve oxygen during long dives.[1]
Sinus bradycardia is a common condition found in both healthy individuals and those who are considered well conditioned athletes.
Heart rates considered bradycardic vary by species; for example, in the common housecat, a rate of under 120 beats per minute is abnormal. Generally, smaller species have higher heart rates while larger species have lower rates.
Causes
- This rhythm may be caused by one of the following:
- Increased vagal tone.
- Sleep
- Hypothermia
- Hypothyroidism
- Intrinsic disease of the SA node (E.g. sick sinus syndrome).
- An effect of drugs, such as the use of digitalis, beta-blockers, quinidine, Adenosine, Calcium channel blocker.
- Seizure.
- It could also be a normal finding in a healthy, well-conditioned person.
- It may be secondary to infections like Diphtheria, acute rheumatic fever, viral myocarditis.
- Increased intracranial pressure.
- Rhodotoxin poisoning.
- As a result of an eating disorder, such as Anorexia Nervosa.
Diagnosis
ECG Characteristics
- Rate: Less than 60 beats per minute.
- Rhythm: Regular.
- P waves: Upright, consistent, and normal in morphology and duration.
- P-R Interval: Between 0.12-0.20 seconds in duration.
- QRS Complex: Less than 0.12 seconds in width, and consistent in morphology.
See also
- Sinus tachycardia
- Long QT syndrome
References
- ^ THORNTON (2004). "Oxygen and the diving seal" (PDF). "The Journal of Hyperbaric Medicine 31 (1): 81–95. Retrieved 29 July 2014.
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Cardiovascular disease I00–I52, 390–429
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| Ischaemic |
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Coronary disease
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- Coronary artery disease (CAD)
- Coronary artery aneurysm
- Coronary artery dissection
- Coronary thrombosis
- Coronary vasospasm
- Myocardial bridge
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Active ischemia
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- Angina pectoris
- Prinzmetal's angina
- Stable angina
- Acute coronary syndrome
- Myocardial infarction
- Unstable angina
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Sequelae
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- hours
- Hibernating myocardium
- Myocardial stunning
- days
- weeks
- Aneurysm of heart / Ventricular aneurysm
- Dressler syndrome
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| Layers |
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Pericardium
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- Pericarditis
- Acute
- Chronic / Constrictive
- Pericardial effusion
- Cardiac tamponade
- Hemopericardium
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Myocardium
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- Myocarditis
- Cardiomyopathy: Dilated (Alcoholic), Hypertrophic, and Restrictive
- Loeffler endocarditis
- Cardiac amyloidosis
- Endocardial fibroelastosis
- Arrhythmogenic right ventricular dysplasia
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Endocardium /
valves
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Endocarditis
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- infective endocarditis
- Subacute bacterial endocarditis
- non-infective endocarditis
- Libman–Sacks endocarditis
- Nonbacterial thrombotic endocarditis
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Valves
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- mitral
- regurgitation
- prolapse
- stenosis
- aortic
- tricuspid
- pulmonary
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Conduction /
arrhythmia |
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Bradycardia
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- Sinus bradycardia
- Sick sinus syndrome
- Heart block: Sinoatrial
- AV
- Intraventricular
- Bundle branch block
- Right
- Left
- Left anterior fascicle
- Left posterior fascicle
- Bifascicular
- Trifascicular
- Adams–Stokes syndrome
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Tachycardia
(paroxysmal and sinus)
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Supraventricular
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- Atrial
- Junctional
- AV nodal reentrant
- Junctional ectopic
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Ventricular
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- Accelerated idioventricular rhythm
- Catecholaminergic polymorphic
- Torsades de pointes
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Premature contraction
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- Atrial
- Junctional
- Ventricular
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Pre-excitation syndrome
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- Lown–Ganong–Levine
- Wolff–Parkinson–White
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Flutter / fibrillation
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- Atrial flutter
- Ventricular flutter
- Atrial fibrillation
- Ventricular fibrillation
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Pacemaker
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- Ectopic pacemaker / Ectopic beat
- Multifocal atrial tachycardia
- Pacemaker syndrome
- Parasystole
- Wandering pacemaker
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Long QT syndrome
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- Andersen–Tawil
- Jervell and Lange-Nielsen
- Romano–Ward
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Cardiac arrest
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- Sudden cardiac death
- Asystole
- Pulseless electrical activity
- Sinoatrial arrest
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Other / ungrouped
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- hexaxial reference system
- Right axis deviation
- Left axis deviation
- QT
- T
- ST
- Osborn wave
- ST elevation
- ST depression
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| Cardiomegaly |
- Ventricular hypertrophy
- Left
- Right / Cor pulmonale
- Atrial enlargement
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| Other |
- Cardiac fibrosis
- Heart failure
- Diastolic heart failure
- Cardiac asthma
- Rheumatic fever
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Index of the heart
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| Description |
- Anatomy
- Physiology
- Development
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| Disease |
- Injury
- Congenital
- Neoplasms and cancer
- Other
- Symptoms and signs
- Blood tests
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| Treatment |
- Procedures
- Drugs
- glycosides
- other stimulants
- antiarrhythmics
- vasodilators
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UpToDate Contents
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English Journal
- Recurrent episodes of asystole from carotid sinus hypersensitivity triggered by positioning for head and neck surgery.
- Truong AT, Sturgis EM, Rozner MA, Truong DT.SourceDepartment of Anesthesiology and Perioperative Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas. atruong@mdanderson.org.
- Head & neck.Head Neck.2011 Jul 7. doi: 10.1002/hed.21812. [Epub ahead of print]
- BACKGROUND: We present a case report of a patient with recurrent thyroid carcinoma, previously treated with surgery and radiotherapy, who developed asystolic episodes on 2 occasions as the result of positioning of the neck in hyperextension for head and neck surgery.METHODS AND RESULTS: In carotid s
- PMID 21739521
Japanese Journal
- 同所性心臓移植後に偽性完全房室ブロックによる徐脈を呈した1例
- 杉山 裕章,今井 靖,藤生 克仁,鈴木 健樹,縄田 寛,小野 稔,絹川 弘一郎,平田 恭信,永井 良三
- 心電図 30(5), 402-409, 2010
- 症例は31歳，男性．24歳時より心筋炎後の心機能低下による難治性心不全をくり返し，左心補助装置などを経て29歳時に心臓移植が施行された．2010年4月，移植2年後の各種検査施行目的にて入院．心臓カテーテル検査では左室壁運動異常なく，有意な冠動脈狭窄病変も認めなかった．一方，入院時より徐脈が遷延しており，一過性に「完全房室ブロック」と思われる心電図波形を示した．電気生理学的検査（EPS）では，移植さ …
- NAID 130000674741
Related Links
- Sinus bradycardia can be defined as a sinus rhythm with a resting heart rate of 60 beats per minute or less. However, few patients actually become symptomatic until their heart rate drops to less than 50 beats per minute. The action potential responsible for this rhythm arises from the sinus node and ...
- When you have a heart rate that is slower than normal, then this is called Bradycardia. Normally, the heart will beat somewhere between 60-100 times every minute. This is for an adult that is resting. Someone that has bradycardia ...
- sinus bradycardia, beating of the sinus node at a rate below 60/min. sinus bradycardia sinus bradycardia A heart rhythm caused by sinus-node dysfunction (sick sinus syndrome), which is characterised by a rhythm of less than 60 ...
Related Pictures
★リンクテーブル★
[★]
- 英
- sinus bradycardia
- 同
- 洞徐脈、洞性徐拍、洞徐拍
- 関
- 徐脈性不整脈、徐脈。洞性頻脈 洞頻脈 sinus tachycardia
[show details]
- 心電図で洞調律かつ、心拍数が60回/分以下のものを指して言う。
- 脈拍は自律神経（興奮）や薬剤、ないし発熱・炎症・虚血で変動しうる。
- スポーツマンの場合、スポーツ心あるいは迷走神経緊張により洞性徐脈が見られることがあるので(生理的)、気にしなくても良い。
- また、健常人でも安静時に徐脈となる人もいるが、活動時にも洞性徐脈が継続するのでなければ、精査・治療対象とはならない。
- しかしながら、徐脈による症状が出現するようであれば精査した方が良い。
- 心拍数が50回/分以下が、(体の動作にかかわらず)持続的に続くようであれば洞不全症候群が疑われるので、専門医受診が好ましい。
[★]
- 英
- sinus bradycardia
- 関
- 洞徐脈、洞性徐脈、洞性徐拍
[★]
- 英
- sinus bradycardia
- 関
- 洞徐脈、洞性徐脈、洞徐拍
