What is the mechanism of dyspnea when it occurs as “Anginal” equivalent ?
Posted Oct 31 2012 11:16am
Anginal equivalents are distinct (often vague ) symptoms that occur in response to myocardial Ischemia , instead of angina.Dyspnea or shortness of breath is the commonest anginal equivalent . The incidence and exact mechanism is not clear. Both angina and dyspnea are sensory events . Both are perceived at the level of cortex. Angina occurs when ischemic muscle triggers pain signals from the nerve twigs engulfing the myocytes membranes and the vasavasorum.
Dyspnea during myocardial ischemia is multi-factorial
Signalling error .( Mismatch between respiratory /Cardiac receptors neural traffic)
Cortical perception disorder.
Autonomic neuropathy (Blocks pain signals but still may carry myocardial stretch response)