When right atrial enlargement occurs, it does not take longer for cardiac action potentials to travel through the atrial myocardium (similar to left atrial enlargement). However, the amplitude of ...

Left-ventricular, right-ventricular and right-atrial size ... 60% and mild left-ventricular hypertrophy and moderate left-atrial enlargement (5.2 cm) were present. A nuclear stress test showed ...

When left atrial enlargement occurs ... P-mitrale occurs when the depolarization of the right atrium and left atrium are both visible in the P wave. This is seen as a notch in the P wave and ...