Introduction Bronchogenic cysts are one of the types of primary cardiac tumors that can occur. They arise in the interatrial septum, especially near the atrioventricular node, which may cause atrioventricular block owing to its location. The incidence of these cardiac tumors is very low. Previous case reports regarding bronchogenic cysts of the interatrial septum have shown association of bronc...

are described; two had ischaemic heart disease, and one had cardiomyopathy. In thefirst case the slow ventricular response to atrialfibrillation was a result of incomplete atrioventricular nodal block, and in the other two His bundle electrograms demonstrated that the slow ventricular response was due to bilateral bundle-branch block. The association of atrial fibrillation and conduction delays...

We have studied 135 patients with the pre-excitation syndrome and have demonstrated evidence of multiple accessory pathways in 20 patients. Five patients had two distinct accessory atrioventricular (A-V) connections, associated with enhanced A-V node conduction in one patient. Twelve patients had a single accessory A-V connection associated with enhanced A-V conduction. In one of these there wa...

nineteen lymph node biopsies, 3 curetting, 15 blood samples obtained from patients with lymphadenitis and high titers of toxoplasma antibodies, and 27 tonsillar tissues removed from patients because of chronic tonsillitis were inoculated intraperitoneally into mice for isolation of toxoplasma gondii. toxoplasms were isolated from 5 lymph node biopsies, one curettage material, 2 tonsillar tissue...

Two brothers with Fabry's disease presenting with palpitations were found to have intermittent supraventricular tachycardias. Their electrocardiograms, when symptom-free, revealed short PR intervals consistent with ventricular pre-excitation. Treatment of one of the brothers with verapamil resulted in improvement of the palpitations and reduction in frequency of the tachycardia. Recurrent supra...

We assessed segmental distribution of blood flow to the right atrium and the region of the sinoatrial node using micropheres (7-10 mum) in 20 anesthetized dogs. Mean right atrial flow averaged 83+/-7 (SE) ml/min X 100 g, which was 56% of the left ventricular blood flow. The distribution of right atrial flow was not homogeneous. For example, flow to anterior right atriaater (105+/-8 ml/min X 100...

T he occurrence of a premature beat between two consecutive conducted sinus beats is termed an interpolated premature systole or extrasystole.1 An interpolated premature ventricular systole can effect the conduction of the subsequent sinus beat by concealed retrograde penetration into the His-Purkinje system or AV node or both. This retrograde concealed penetration can result in a prolongation ...

Using His bundle recordings and ventricular stimulation retrograde conduction was studied in 57 cases of complete AV block. VA conduction was observed in 13 patients. Of the 13, 12 had AV block distal to H, and during cardiac pacing 5 of them showed a retrograde His bundle potential. In all cases the AV node-His pathway was implicated in the transmission of the retrograde impulse. There was no ...

introduction: despite extensive studies about effects of crataegus monogyna on cardiovascular diseases yet, a few study has been undertaken antiarrhythmic property of this plant. aims of the present study were: 1) to determine the protective role of methanolic extract of c.monogyna on the rate-dependent model and the concealed conduction . 2) to explore the role of na+-k+ a tpase in the protect...

I’ this issue of Chest (see page 24), James and MacLean present the pathologic findings in a 17-year-old male athlete with recurrent syncope, documented ventricular tachycardia, and sudden cardiac death. The patient’s brother had a somewhat similar history and also died suddenly. Pathologic examination in the present case revealed some fetal dispersion of the A-V node, a right-sided His bundle,...