Isolated drainage of either the superior or inferior vena cava to the left atrium is a rare condition. Isolated drainage of the inferior vena cava to the left atrium has been described only by Gardner and Cole (1955) and by Meadows, Bergstrand, and Sharp (1961). The condition leads to a right-toleft shunt in the absence of clinical features of cardiovascular abnormalities. A further case in whi...

Cardiac electrophysiological heterogeneity related to the washout of acetylcholine (ACh) remains incompletely characterized. The aim of this study was to examine whether positive cardiac inotropic action is associated with electrophysiological heterogeneity between the atrium and the ventricle after ACh perfusion and washout. Epicardial monophasic action potentials (MAPs) from the right ventric...

Radiolabeled triiodothyronine (T3) binding to isolated nuclei was measured to compare the binding characteristics of the nuclear receptors in rabbit ventricular and atrial muscle cells. Scatchard analysis of the binding data yielded a maximum binding capacity of 170 +/- 20 fmol per mg DNA and apparent dissociation constant of 525 +/- 100 pM for ventricular nuclei. The binding capacity and the d...