Electrocardiographic patterns in biventricular pacing delivered by second-generation cardiac resynchronization devices.

Background: With increasing use of cardiac resynchronization therapy (CRT), treating physicians should be familiar with different electrocardiographic (ECG) patterns of left ventricular (LV) lead and biventricular (BiV) pacing. However, there are a few publications on ECG patterns during BiV pacing.

Purpose: This study was sought to determine different ECG patterns in patients with BiV pacing.

Difficult management of coronary artery disease in a patient with thrombotic thrombocytopenic purpura.

Thrombotic thrombocytopenic purpura (TTP) is a rare syndrome affecting multiple organs. There is no sufficient evidence regarding the clinical cardiac manifestations of TTP. Nonetheless, pathologic cardiac involvement is quite frequent in acute TTP, which is predominantly manifested as myocardial necrosis due to coronary arteriolar microthrombosis.