Biomedical subjects

S Bando

Publications and source records attributed to S Bando.

At least 55 records · Page 3Linked to original sources

PubMed1989

[Electrophysiological effects of magnesium sulfate on human conduction system].

Electrophysiological studies were performed to evaluate the effects of MgSO4 on human conduction system. Nine patients who received 20 mg/kg of MgSO4 did not show any significant changes in the electrophysiological parameters except for prolongations in the PR and AH intervals. After the infusion of 40 mg/kg of MgSO4 in eleven patients, sinus cycle length and corrected sinus node recovery time were increased but statistically insignificantly. Sinoatrial conduction time, the PR interval and AH interval were increased. The effective refractory period (ERP) of right atrium, ERP of atrioventricular node (AV node), ERP of right ventricule and ERP/QTc were increased significantly. These findings suggests that the antiarrhythmic effects of magnesium were due to (1) suppression of the functions of the sinus and AV nodes, and (2) shortening of the duration of the ventricular vulnerable period during the cardiac cycle and prevention of ventricular arrhythmias related reentry mechanism.

Adolescent↗

PubMed1989

[A case of anomalous origin of right coronary artery from the left sinus of Valsalva with ventricular aneurysm ventricular tachycardia and paroxysmal A-V block].

A 51-year old man was admitted to our hospital, because of syncope. During admission, he had three episodes of syncopal attack. During the episodes, monitor ECG showed two times of ventricular tachycardia and one of paroxysmal A-V block. The left ventriculogram showed dilatation of left ventricle with posterobasal aneurysm, anterobasal and apical hypokinesis. The left coronary artery was normal. The right coronary artery originated from the left sinus of Valsalva and passed through between aortic root and pulmonary trunks. There was no atherosclerotic lesions in both coronary arteries. Non-sustained ventricular tachycardia was induced by triple premature stimulations. The inverse relation between the coupling interval of premature stimulation and the echo interval was recognized. Lidocaine (50 mg IV), Flecainide (300 mg/day), Mexiletine (450 mg/day), and Aprindine (60 mg/day) prevented ventricular tachycardia. Rapid atrial pacing induced paroxysmal A-V block. Permanent pacemaker was implanted because of syncope due to paroxysmal A-V block and ventricular tachycardia was prevented by Aprindine. Recently, the case with anomalous origin of the coronary artery increased by the popularity of coronary angiography. But, this case considered to be rare because of complication with ventricular aneurysm and lethal arrhythmia (ventricular tachycardia and paroxysmal A-V block).

Coronary Vessel Anomalies↗

PubMed1988