myocardial stunning


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Related to myocardial stunning: Stunned myocardium

myocardial stunning

A term of art for prolonged, nonpermanent, post-ischaemic, systolic and/or diastolic ventricular dysfunction without myocardial necrosis. In myocardial stunning (MS), the myocardium is viable and has contractile reserve. MS may follow successful thrombolytic therapy in evolving acute MI, percutaneous transluminal angioplasty, during exercise, and after relief of ischaemia caused by vasospasm.
 
Pathogenesis
Uncertain; MS has been attributed to oxidative stress, or to a transient increase in intracellular calcium.

myocardial stunning

Stunning Cardiology Prolonged nonpermanent postischemic systolic and/or diastolic ventricular dysfunction without myocardial necrosis; MS may follow successful thrombolytic therapy in evolving MI, PCTA, during exercise, and after relief of ischemia caused by vasospasm. Cf Myocardial hibernation.

my·o·car·di·al stun·ning

(mīō-kahrdē-ăl stŭning)
Decreased myocardial contractility occuring in noninfarcted areas due to excess production of free radicals in infarcted areas.

Myocardial stunning

A reversible state of left ventricular dysfunction featuring chest pain, dyspnoea, ECG changes, and sometimes hypotension or heart failure requiring supportive measures. The condition may be precipitated by sudden severe emotional stress and in these cases the levels of catecholamines may be up to 30 times normal.
References in periodicals archive ?
Rizvi et al., "Oxidant species trigger late preconditioning against myocardial stunning in conscious rabbits," American Journal of Physiology--Heart and Circulatory Physiology, vol.
The recent study was undertaken to examine the cardio-protective effect of NNBP on myocardial tissue perfusion, cardiac myocyte apoptosis, myocardial stunning, and heart contractile function in hypertrophied hearts.
Stress (Takotsubo) cardiomyopathy--a novel pathophysiological hypothesis to explain catecholamine-induced acute myocardial stunning. Nat.
Ishihara, "Myocardial stunning due to simultaneous multivessel coronary spasms: a review of 5 cases," Journal of Cardiology, vol.
These consequences are collectively referred to as myocardial stunning. Reduction of myocardial blood flow subsequent to hemodialysis can cause repeated ischaemia, leading to chronic reduction in left ventricular function (Burton, Jefferies, Selby, & McIntyre, 2009).
Myocardial stunning due to simultaneous multivessei coronary spasm: A review of 5 cases.
There is a catecholamine-induced microvascular spasm resulting in myocardial stunning, or it can cause direct catecholamine-associated myocardial toxicity [7].
In addition, thrombus embolization, myocardial stunning, acute ischemic microvascular dysfunction, and other factors make reaching a complete microvascular vasodilation unlikely.
Myocardial stunning is thought to be one of those non-traditional risks.
Myocardial ischemia-reperfusion injuries in pathological disorders include reperfusion arrhythmias, transient mechanical dysfunction, myocardial stunning, and cell death [3].
Stress (takotsubo) cardiomyopathy --a novel pathophysiological hypothesis to explain catecholamine-induced acute myocardial stunning. Nat Clin Pract Cardiovasc Med 2008;5:22-9.