Right atrial sensing for VDD pacing through a persistent left superior vena cava.

This report describes a pacing lead insertion through a persistent left superior vena cava in the VDD pacing mode, with a large retrograde lead course allowing the optimal positioning of the sensing electrodes in the right atrium.

[Isolated non-compaction of the left ventricle].

Isolated non compaction of the left ventricle is a rare congenital cardiomyopathy linked to an arrest of normal myocardial embryogenesis. We report two cases of isolated non compaction of the left ventricle discovered by echocardiography in 2 males of 30 and 55 years. The first had progressively worsening cardiac insufficiency, the second was being followed for an unexplained cardiomyopathy.