In patients with atrioventricular septal defect (AVSD), the occurrence of nonsurgical AV block has been reported. We have looked for an explanation in the development of the AV conduction system.

Thomas Kurian, M.D.; Christina Ambrosi, M.Sc.; William Hucker, M.D., Ph.D.; Vadim V. Fedorov, Ph.D.; Igor R. Efimov, Ph.D. It is apparent that both structural and ...

Explaination: Once again the AV nodal blocking medications should not be used since blocking the AV node allows more impulses to travel through the accessory pathway thus making the ventricular rate ...

This is a narrow complex tachycardia with a rate of 124 beats/min. The QRS morphology and axis are normal. The QTc is prolonged, at 529 ms (normal, 390-450 ms for men). The underlying P waves appear ...