容量過負荷
WordNet
- a relative amount; "mix one volume of the solution with ten volumes of water"
- the amount of 3-dimensional space occupied by an object; "the gas expanded to twice its original volume"
- the magnitude of sound (usually in a specified direction); "the kids played their music at full volume" (同)loudness, intensity
- a publication that is one of a set of several similar publications; "the third volume was missing"; "he asked for the 1989 volume of the Annual Review"
- become overloaded; "The aerator overloaded"
- an excessive burden (同)overburden
- an electrical load that exceeds the available electrical power
- place too much a load on; "dont overload the car" (同)surcharge, overcharge
- furnished with volumes; "a large room volumed with ancient books"
- (often used in combination) consisting of or having a given number or kind of volumes; "the poets volumed works"; "a two-volumed history"; "multi-volumed encyclopedias"; "large-volumed editions"
- formed or rising in rounded masses; "gasping with the volumed smoke"
PrepTutorEJDIC
- 〈C〉(特に分厚い)『本』,書物 / 〈C〉(シリーズものの)『巻』,冊(《略》(単数形で)vol.,(複数形で)vols.) / 〈U〉(…の)『体積』,容積《+of+名》 / 〈U〉〈C〉)…の)『量』,かさ《+of+名》 / 〈U〉(…の)『音量』,音の強さ,ボリューム《+of+名》 / 《複数形で》多量(の…),たくさん(の…)《+of+名》
- …‘に'荷を積み過ぎる(負わせ過ぎる) / 〈バッテリー・変圧器など〉‘に'充電し過ぎる;〈銃砲〉‘に'装薬し過ぎる / 〈C〉〈U〉積み過ぎ;〈U〉過充電;過負荷
Wikipedia preview
出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2015/05/19 09:01:25」(JST)
[Wiki en表示]
Not to be confused with fluid overload.
Representation of the cardiac response in stroke volume to left ventricular filling under normal conditions. There is an optimum end-diastolic volume at which maximum stroke volume and cardiac output is achieved. Beyond this, there is
volume overload, and stroke volume is diminished.
Volume overload refers to the state of one of the chambers of the heart in which too large a volume of blood exists within it for it to function efficiently. Ventricular volume overload is approximately equivalent to an excessively high preload. It is a cause of cardiac failure.[1]
Contents
- 1 Pathophysiology
- 2 Causes
- 3 References
- 4 See also
Pathophysiology
In accordance with the Frank–Starling law of the heart, the myocardium contracts more powerfully as the end-diastolic volume increases. Stretching of the myofibrils in cardiac muscle causes them to contract more powerfully due to a greater number of cross-bridges being formed between the myofibrils within cardiac myocytes.[2] This is true up to a point, however beyond this there is a loss of contractile ability due to loss of connection between myofibrils; see figure.
Various pathologies, listed below, can lead to volume overload. Different mechanisms are involved depending on the cause, however the common theme is that of a high cardiac output with a low or normal afterload. The output may be high due to the inefficiency in valve disease, or it may be high due to shunting of blood in left-to-right shunts and arteriovenous malformations.
Left ventricular volume overload may produce inverted u waves on the electrocardiogram.[3]
Causes
Causes may be considered according to which chamber is affected.
Left ventricular volume overload
- Valvular heart disease[4]
- Aortic regurgitation
- Mitral regurgitation, also causing left atrial volume overload[5]
- Congenital heart defects
- Patent ductus arteriosus
- Ventricular septal defect, also causing left atrial volume overload[6]
- Arteriovenous malformation and fistula
- Giant hepatic haemangioma
- High-output haemodialysis fistula
Right ventricular volume overload
- Valvular heart disease
- Tricuspid regurgitation
- Pulmonary regurgitation
- Congenital heart defects
- Atrial septal defect, also causing right atrial volume overload[6]
References
- ^ Costanzo, Linda S. (2007). Physiology. Hagerstwon, MD: Lippincott Williams & Wilkins. p. 81. ISBN 0-7817-7311-3.
- ^ Klabunde, Richard E. "Cardiovacular Physiology Concepts". Lippincott Williams & Wilkins, 2011, p. 74.
- ^ Conrath C, Opthof T (2005). "The patient U wave". Cardiovasc Res 67 (2): 184–6. doi:10.1016/j.cardiores.2005.05.027. PMID 15979057.
- ^ Left Ventricular Volume Overload, Discussion of echocardiography findings.
- ^ Gehl LG, Mintz GS, Kotler MN, Segal BL (1982). "Left atrial volume overload in mitral regurgitation: a two dimensional echocardiographic study". Am J Cardiol 49 (1): 33–8. doi:10.1016/0002-9149(82)90274-0. PMID 7053608.
- ^ a b Gardiner M, Eisen S, Murphy C. Training in paediatrics: the essential curriculum. Oxford University Press, Oxford 2009.
See also
- Frank–Starling law of the heart
- Cardiac failure
- Preload (cardiology)
UpToDate Contents
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English Journal
- Ideal target arterial pressure after control of bleeding in a rabbit model of severe traumatic hemorrhagic shock: results from volume loading-based fluid resuscitation.
- Zhao XG1, Jiang SY1, Zhang M1, Zhou GJ1, Zhao YY1, Yi HX1, Jiang LB1, Wang JA2.
- The Journal of surgical research.J Surg Res.2015 Jun 15;196(2):358-367. doi: 10.1016/j.jss.2015.02.052. Epub 2015 Feb 26.
- BACKGROUND: Previously reported ideal target mean arterial pressure (MAP) after control of bleeding in traumatic hemorrhagic shock (THS) requires further verification in more clinically related models. The authors explored this issue via gradient volume loading without vasopressor therapy. As certai
- PMID 25791824
- A 5-year follow-up in deferasirox treatment: improvement of cardiac and hepatic iron overload and amelioration in cardiac function in thalassemia major patients.
- Cassinerio E1, Roghi A, Orofino N, Pedrotti P, Zanaboni L, Poggiali E, Giuditta M, Consonni D, Cappellini MD.
- Annals of hematology.Ann Hematol.2015 Jun;94(6):939-45. doi: 10.1007/s00277-014-2291-x. Epub 2015 Jan 8.
- Deferasirox (DFX) is an oral iron chelator with established efficacy and safety. We evaluated by T2* cardiovascular magnetic resonance (CMR) the efficacy of DFX in preventing and removing cardiac and liver iron load and cardiac volume changes, along 5 years in adult thalassemia major (TM) patients.
- PMID 25563596
- Middle-term results of trans-catheter creation of atrial communication in patients receiving mechanical circulatory support.
- O'Byrne ML1,2, Glatz AC1,2, Rossano JW1, Schiavo KL1, Dori Y1, Rome JJ1, Gillespie MJ1.
- Catheterization and cardiovascular interventions : official journal of the Society for Cardiac Angiography & Interventions.Catheter Cardiovasc Interv.2015 Jun;85(7):1189-95. doi: 10.1002/ccd.25824. Epub 2015 Feb 3.
- OBJECTIVE: To describe our center's middle-term outcomes following trans-catheter creation of atrial communication (ASD) in patients on mechanical circulatory support.BACKGROUND: Trans-catheter creation of an ASD in patients on mechanical circulatory support is an adjuvant therapy to reduce left atr
- PMID 25573820
Japanese Journal
- Tremendous Enhancement of Torque Density in HTS Induction/Synchronous Machine for Transportation Equipments
- Nakamura Taketsune,Itoh Yoshitaka,Yoshikawa Masaaki,Nishimura Tatsuo,Ogasa Takuro,Amemiya Naoyuki,Ohashi Yoshimasa,Fukui Satoshi,Furuse Mitsuho
- IEEE Transactions on Applied Superconductivity 25(3), 2015-06
- … And then, the 70% reduction of the motor's volume is challenged with the same power (2nd generation). … We successfully realized the tremendous enhancement of the torque density, and further the overload tolerance was also realized at the steady state. …
- NAID 120005567894
- Successful Treatment of Intractable Fluid Retention Using Tolvaptan After Treatment for Postoperative Mediastinitis in a Patient With a Left Ventricular Assist Device
- Kimura Mitsutoshi,Nawata Kan,Kinoshita Osamu,Hatano Masaru,Imamura Teruhiko,Kinugawa Koichiro,Ono Minoru
- International Heart Journal 56(5), 574-577, 2015
- … Tolvaptan may be useful for correcting hyponatremia and volume overload in patients under LVAD support. …
- NAID 130005102114
- Successful Treatment of Intractable Fluid Retention Using Tolvaptan After Treatment for Postoperative Mediastinitis in a Patient With a Left Ventricular Assist Device
- Kimura Mitsutoshi,Nawata Kan,Kinoshita Osamu,Hatano Masaru,Imamura Teruhiko,Kinugawa Koichiro,Ono Minoru
- International Heart Journal advpub(0), 2015
- … Tolvaptan may be useful for correcting hyponatremia and volume overload in patients under LVAD support. …
- NAID 130005098499
Related Links
- volume the space occupied by a substance or a three-dimensional region; the capacity of such a region or of a container. closing volume (CV) the volume of gas in the lungs in excess of the residual volume at the time when small ...
- References for "Volume overload" im Internet, an Universitäten und in der Literatur... cyclopaedia.net ... Hypervolemia, or fluid overload, is the medical condition where there is too much fluid in the blood. The opposite condition is hypovolemia ...
★リンクテーブル★
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- 英
- volume overload
- 関
- 容量負荷
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- 関
- 容量過負荷、左室容量過負荷
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- 関
- amount、bulk、content、quantity
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