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Results for “Bundle-Branch Block”

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At least 505 records · Page 28Linked to original sources
PubMed1978

[Lorcainid--electrophysiologic examinations of a new anti-arrhythmia agent].

The electrophysiologic properties of Lorcainide (1.25 and 2.5 mg/kg) were studied on 21 patients by intracardiac electrograms and atrial stimulation. A prolongation of the H-V interval, widening of QRS duration but only minor changes in A-H interval were found. The effective refractory period of the atria increased, the effective and functional refractory periods of the A-V node changed variable following Lorcainide. There was a slight increase in heart rate and the sinus node recovery time was longer after 2.5 mg/kg of the drug. The major site of action of Lorcainide in man appears to be the His-Purkinje system. In electrophysiologic terms the new antiarrhythmic agent closely resembles Aprindine.

Acetanilides↗
PubMed1979

[State of the heart conduction system in the sick sinus syndrome (according to the recording of the bundle of His potentials and the atrial stimulation test)].

It was established that the presence of Samoilov-Wenckebach's periods and prolongation of the H--V interval at low frequency of the imposed rhythm as well as periods of asystolia of more than 1,200 msec are most typical for these patients. An attempt was made to determine the type of cardiac stimulation indicated for such patients from the character of the disorders of rhythm observed in them and the initial frequency of their own cardiac contractions.

Action Potentials↗
PubMed1979

[Treatment of severe ventricular arrhythmia by means of repeated cardiac stimulation].

The overdrive pacing method is widely used now in clinical practice for prevention and treatment of severe ventricular disorders of the cardiac rhythm. The mechanisms of arrhythmia suppression by means of this stimulation is analysed. Indications are determined for the choice of the site of stimulation and optimal impulce frequency in ischemic heart disease, and overdosage with digitalis drugs, as well as in myocardiopathy.

Adult↗
PubMed1976

'Supernormal' phase in hemiblock conduction.

A case is described where the basic sinus rhythms is associated with an advanced degree of left anterior hemiblock. The rhythm is complicated by atrial extrasystoles, associated with a lesser degree of left anterior hemiblock. This paradox of 'supernormality' is explained on a critical interplay of differential refractoriness within the divisions of the left bundle-branch.

Adult↗