In a “normal” electrocardiogram (ECG), the transition of the QRS axis in the precordial leads occurs between leads V 3 and V 4 (i.e., there is a dominant S in V 3 and a dominant R in V 4).

Venus rotates clockwise, opposite most planets, a phenomenon called retrograde rotation. A day on Venus is longer than its year, and the sun rises in the west. Scientists believe a collision or ...

We have all been taught in school that planets revolve in the same direction as the Earth, i.e., in the counterclockwise ...