MRCP UK EXAMINATIONS

ABDOMINAL

GENERALISED LYMPHADENOPATHY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
A 48-year-old man, with a history of transmural heart infarction of the left ventricle’s myocardium, died from the veritable rupture of. heart (the heart tamponade). What process in an infarct zone could promote a heart’s wall rupture?
A
Autolysis with melting of myocardium tissue (myomalacia)
B
Substitution of connective tissue in area of infarction (organization)
C
Rising of blood pressure in the small circulatory circle
D
Scar formation with thinning of wall of the left ventricle
Explanation: 

Detailed explanation-1: -As compared with the right ventricle, the left ventricle contracts against much greater resistance (i.e the pressure in the systemic circulation) and therefore it faces the highest work load; for the same reason the left ventricle has the highest oxygen demand.

Detailed explanation-2: -In conclusion, left ventricular free-wall rupture is a potentially life-threatening mechanical complication of acute myocardial infarction. It mostly occurs in patients with ST-elevation MI. Other causes, such as infections and trauma, are also responsible.

Detailed explanation-3: -Cardiac tamponade occurs when excessive fluid accumulates in the pericardium, in turn compressing the heart and restricting the filling of the cardiac chambers and ultimately causing hypotension and cardiac arrest.

There is 1 question to complete.