According to the physiological and morphological studies of the cardiac conduction system by PURKINJE (1945), ENGELMANN (1894, 1895, 1897), HIS (1893), TAWARA (1906), KEITH and FLACK (1907) and others, the stimulation of the heart occurs at the conduction system and is conducted through this specialized system but not through the ordinary muscle. Although GLOMSET and his coworkers (19401952) po...

To determine the frequency of atrioventricular conduction disturbances in aortic valve disease, 26 consecutive patients (age 54 +/- 2 years) with symptomatic aortic valve disease were studied by His bundle electrocardiography at the time of cardiac catheterisation and were compared with a group of patients who underwent cardiac catheterisation and were found to have coronary artery or mitral va...

Incomplete right bundle-branch block (IRBBB) usually is thought to be associated with abnormalities of the peripheral Purkinje system. This paper discusses the results of a study of six dogs from the same family and three nonrelated dogs with congenital IRBBB. Cardiac catheterization data were normal, and no evidence or history of cardiac disease was found before or after death. The depolarizat...

Incomplete right bundle-branch block (IRBBB) usually is thought to be associated with abnormalities of the peripheral Purkinje system. This paper discusses the results of a study of six dogs from the same family and three nonrelated dogs with congenital IRBBB. Cardiac catheterization data were normal, and no evidence or history of cardiac disease was found before or after death. The depolarizat...

Epidemiological studies have identified associations between time of day and risk of sudden cardiac death. The marked peak in the occurrence of sudden cardiac death after awakening suggests that the disease is triggered by changes that occur during this time period. Increased sympathetic stimulation is a likely cause of such triggering. In the light of the circadian variation of sudden cardiac ...

We present a case of swine flu presenting as bilateral pneumonia with involvement of cardiac conduction system in the form of increased PR interval and sinus bradycardia during the initial course of disease process. To the best of our knowledge, affection of conducting system in a case of swine flu has not been reported in the literature so far.

BACKGROUND Conduction system defects and slowed ventricular conduction are common in patients with systolic dysfunction and contribute to arrhythmias and sudden death. In animal models of heart failure, cardiac alpha1-adrenergic signaling is constitutively activated. Here, we report the effects of constitutive activation of alpha1-adrenergic signaling on connexin phosphorylation and cardiac con...