منابع مشابه
Functional block in the intraventricular conduction system.
WHEN a normal impulse of supraventricular origin arrives at the His bundle, the entire specialized conduction system has had ample time to recover from the preceding response; the activation sequence of the ventricles and the resulting QRS complex are <'normal." When a lesion permanently damages one of the major divisions of the common bundle, the ventricular activation sequence is permanently ...
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 کاملLeft axis deviation: a spectrum of intraventricular conduction block.
The effects of left axis shift (greater than -30 degrees) on intraventricular conduction time (IVCT) were studied in 63 subjects in whom electrocardiograms before and after appearance of the left axis shift were available. Subjects with electrocardiographic evidence of left or right ventricular hypertrophy, left or right bundle branch block, myocardial infarction, pre-excitation and those recei...
متن کاملRecognition and significance of intraventricular block due to myocardial infarction (peri-infarction block).
Evidence of peri-infarction block was found in 39% of the electrocardiograms of 1,938 patients with definite evidence of myocardial infarction. It most commonly occurred acutely or within several days following infarction and was more common with recurrent infarction. Peri-infarction block infrequently disappeared and was associated with higher values for serum glutamic-oxalacetic transaminase ...
متن کاملBlock of 5-HT2 Receptors Enhances Hippocampal Long-Term Potentiation
The effect of endogenous serotonin on long-term potentiation (LTP) in region CAI was studied by blocking 5-HT2 receptors with ketanserin in rat hippocampal slices. Such a block significantly en-hanced long-term potentiation of the CAI population spike induced by high frequency stimulation of the schaffer collateral/ commissural pathway. This implies that serotonin acts on 5-HT2 receptors in CAI...
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ژورنال
عنوان ژورنال: Japanese Circulation Journal
سال: 1966
ISSN: 0047-1828,1347-4839
DOI: 10.1253/jcj.30.144