Cardiac innervation and conduction abnormalities.

Abnormalities of cardiac conduction in diabetics.

Innervation of the human cardiac conduction system at birth.

OBJECTIVE To study the pattern of innervation of the conduction system of the neonatal heart in humans. DESIGN A prospective analysis based on immunohistochemical and enzyme histochemical examination of newborn human hearts. SETTING A general district hospital. MAIN OUTCOME MEASURES Fresh necropsy tissue. MATERIAL Hearts of three neonatal humans with no cardiac anomaly, freshly taken at...

Cardiac conduction abnormalities during percutaneous balloon mitral or aortic valvotomy.

To evaluate the electrophysiologic changes in the cardiac conduction system that occur during percutaneous mitral or aortic balloon valvotomy, we prospectively studied the conduction system in 19 patients (10 mitral, 8 aortic, and 1 both) undergoing this procedure. A His bundle electrogram was recorded in all patients, and when sinus rhythm was present, the atrioventricular (AV) node effective ...

Effect of Digoxin on Atrioventricular Conduction Studies in Patients with and without Cardiac Autonomic Innervation

The effect of digoxin on atrioventricular (A-V) conduction-was compared in five patients with an intact cardiac autonomic nervous system (Group I) and seven patients who had undergone cardiac transplantation (Group II), in whom we have previously shown the transplanted heart to be completely denervated.Small decreases in the atrial effective refractory period (ERP) (from 262 ± 12 to 254 ± 11 ms...

Effect of digoxin on atioventricular conduction. Studies in patients with and without cardiac autonomic innervation.

The effect of digoxin on atrioventricular (a-v) conduction was compared in five patients with an intact cardiac autonomic nervous system (Group I) and seven patients who had undergone cardiac transplantation (Group II), in whom we have previously shown the transplanted heart to be completely denervated. Small decreases in the atrial effective refractory period (ERP) (from 262 plus or minus 12 t...