Action of verapamil on sinus node, atrioventricular, and intraventricular conduction.
نویسندگان
چکیده
منابع مشابه
Electrocardiographic manifestations of dual atrioventricular node conduction during sinus rhythm.
OBJECTIVES The objective of this study was to correlate electrocardiographic (ECG) PR interval changes during normal sinus rhythm with recent observations regarding the anatomy and physiology of the dual, slow and fast atrioventricular (AV) pathways. BACKGROUND The least common manifestation of dual AV conduction is an abrupt PR interval change in the setting of sinus rhythm. Whereas isolated...
متن کاملPathologic Features of Atrioventricular and Intraventricular Conduction Disturbances
T HE AVAILABILITY of continuous electrocardiographic monitoring techniques has resulted in recognition that conduction disturbances occur more frequently in patients with acute myocardial infarction than was previously thought to be the case. Complete atrioventricular (A-V) block has been reported in up to 9% of patients who have had acute infarcts,1 and bundle-branch block has been recorded in...
متن کاملEffect of adenosine on atrioventricular conduction. I: Site and characterization of adenosine action in the guinea pig atrioventricular node.
Adenosine has a negative dromotropic effect and modulates hypoxia-induced atrioventricular (AV) conduction delay. To further characterize the negative dromotropic effect of adenosine in the guinea pig heart, we determined the site of adenosine-induced AV conduction block; the effect of uptake and deamination of adenosine on its concentration-negative dromotropic effect, and the adenosine recept...
متن کاملAtrioventricular block response to exercise and intraventricular conduction at rest.
Sixty patients with atrioventricular block were exercised and monitored by a radioelectrocardiograph. Cases with a bundle-branch block QRS pattern at rest presented an improvement of atrioventricular conduction on exercise in I2@5 per cent, no change in 43-8 per cent, and an impairment in 43 8 per cent of cases. Corresponding figures in cases with no intraventricular conduction defect were 6I 4...
متن کاملA Mutation in the G-Protein Gene GNB2 Causes Familial Sinus Node and Atrioventricular Conduction Dysfunction.
RATIONALE Familial sinus node and atrioventricular conduction dysfunction is a rare disorder that leads to paroxysmal dizziness, fatigue, and syncope because of a temporarily or permanently reduced heart rate. To date, only a few genes for familial sinus and atrioventricular conduction dysfunction are known, and the majority of cases remain pathogenically unresolved. OBJECTIVE We aim to ident...
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ژورنال
عنوان ژورنال: Heart
سال: 1973
ISSN: 1355-6037
DOI: 10.1136/hrt.35.7.734