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Pathology

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CVS

Question
19 out of 19
 

Most common site of artery of atherosclerosis: (LQ)



A Right coronary artery

B Left anterior descending coronary artery

C Left circumflex artery

D Diagonal branch of LAD

Ans. B Left anterior descending coronary artery

The frequencies of involvement of each of the three main arterial trunks and the corresponding sites of myocardial lesion resulting in infracting (in the typical right dominant heart) are as follows:

· Left anterior descending coronary artery (40% to 50%) Infarcts involving the anterior wall of left ventricle near the apex; the anterior portion of ventricular septum and the apex circumferentially

· Right coronary artery (30% to 40%) infarcts involving the inferior posterior wall of left ventricle posterior portion of ventricular septum; and the inferior posterior right ventricular free wall in some cases

· Left circumflex coronary artery (15% to 20%) infarcts involving the lateral wall of left ventricle except at the apex.



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