Conduction System Involvement

Conduction tissue damage can be due to lymphocytic myocarditis, opportunistic infections, and drug cardiotoxicity or to the localization of HIV within the conduction system myocytes. Histological examination may reveal a lymphomonocytic infiltration, myocyte degenerative changes, and fibrosis. These changes can be associated with elec­trocardiographic abnormalities, most fre­quently first-degree atrioventricular block, left anterior hemiblock, and left bundle block [1].