Ventricular systole induces self-contraction such that pressure in both left and right ventricles rises to a level above that in the two atrial chambers, thereby closing the tricuspid and mitral valves—which are prevented from inverting by the chordae tendineae and the papillary muscles. Which valves are closed during the lateRead More →
When the J-point is elevated at least 2 mm above baseline, it is consistent with a STEMI. A T wave follows the QRS complex and indicates ventricular repolarization. Unlike a P wave, a normal T wave is slightly asymmetric; the peak of the wave is a little closer to itsRead More →
What is Ventricular Ectopy? Ectopic heartbeats are small changes in an otherwise normal heartbeat that lead to extra or skipped heartbeats. They often occur without a clear cause and are most often harmless. Can ectopic beats damage your heart? Although the symptoms of the heart missing a beat or aRead More →
The mitral and tricuspid valves, also known as the atrioventricular, or AV valves, open during ventricular diastole to permit filling. Late in the filling period the atria begin to contract (atrial systole) forcing a final crop of blood into the ventricles under pressure—see cycle diagram. Does aortic pressure decrease duringRead More →