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. 1970 May;32(3):377–385. doi: 10.1136/hrt.32.3.377

Ventricular parasystole in acute myocardial infarction

J Salazar 1,1, C S McKendrick 1
PMCID: PMC487337  PMID: 5420084

Abstract

The clinical and electrocardiographic features of 11 patients with ventricular parasystole in acute myocardial infarction are described. This arrhythmia always appeared within the first 24 hours after the beginning of the pain, and lasted usually a few hours. Only one patient received digitalis before the appearance of the arrhythmia; the others did not receive any drug of known arrhythmic potential. The treatment was mainly with lignocaine intravenously, the response to which was usually very good.

There was no relation between this arrhythmia and the plasma potassium levels.

The electrocardiographic finding of fusion beats, coupling, retrograde conduction, interectopic interval, ectopic cycle length, and exit block were analysed. Two of the cases were examples of intermittent parasystole.

The relation between this arrhythmia and the slow idioventricular rhythm was discussed.

It appears that this is a benign arrhythmia, easily controlled by treatment, produced perhaps by the same mechanisms as ventricular tachycardia, but with the existence of exit block.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

  1. BURCHELL H. B. Analogy of electronic pacemaker and ventricular parasystole with observations on refractory period, supernormal phase, and synchronization. Circulation. 1963 May;27:878–889. doi: 10.1161/01.cir.27.5.878. [DOI] [PubMed] [Google Scholar]
  2. GOLBEY M., LADOPULOS C. P., ROTH F. H., SCHERF D. Changes of ventricular impulse formation during carotid pressure in man. Circulation. 1954 Nov;10(5):735–741. doi: 10.1161/01.cir.10.5.735. [DOI] [PubMed] [Google Scholar]
  3. HEINZ R. E., ELDRIDGE F. L. Ventricular parasystole in a five-year-old child. Am Heart J. 1957 Apr;53(4):624–627. doi: 10.1016/0002-8703(57)90369-1. [DOI] [PubMed] [Google Scholar]
  4. LANGENDORF R., PICK A. Mechanisms of intermittent ventricular bigeminy. II. Parasystole, and parasystole or re-entry with conduction disturbance. Circulation. 1955 Mar;11(3):431–439. doi: 10.1161/01.cir.11.3.431. [DOI] [PubMed] [Google Scholar]
  5. MUELLER P., BARON B. Clinical studies on parasystole. Am Heart J. 1953 Mar;45(3):441–447. doi: 10.1016/0002-8703(53)90154-9. [DOI] [PubMed] [Google Scholar]
  6. NUNEZ-DEY D., ZALTER R., EISENBERG H. Artificially induced parasystole in man due to surgically implanted myocardial pacemaker. Am J Cardiol. 1962 Oct;10:535–546. doi: 10.1016/0002-9149(62)90379-x. [DOI] [PubMed] [Google Scholar]
  7. PICK A. Parasystole. Circulation. 1953 Aug;8(2):243–253. doi: 10.1161/01.cir.8.2.243. [DOI] [PubMed] [Google Scholar]
  8. ROSSI P., MOTOLESE M., PASSARO G. Idioventricular parasystole with exit block in a subject with complete atrioventricular dissociation. Am Heart J. 1959 May;57(5):775–781. doi: 10.1016/0002-8703(59)90188-7. [DOI] [PubMed] [Google Scholar]
  9. SCHAMROTH L. Ventricular parasystole with slow manifest ectopic discharge. Br Heart J. 1962 Nov;24:731–737. doi: 10.1136/hrt.24.6.731. [DOI] [PMC free article] [PubMed] [Google Scholar]
  10. SCHERF D., BLUMENFELD S., YILDIZ M. Extrasystoles and parasystole. Am Heart J. 1962 Sep;64:357–363. doi: 10.1016/0002-8703(62)90150-3. [DOI] [PubMed] [Google Scholar]
  11. SCHERF D., BORNEMANN C. Parasystole with a rapid ventricular center. Am Heart J. 1961 Sep;62:320–331. doi: 10.1016/0002-8703(61)90398-2. [DOI] [PubMed] [Google Scholar]
  12. SCHERF D., BOYD L. J. Three unusual cases of parasystole. Am Heart J. 1950 May;39(5):650–663. doi: 10.1016/0002-8703(50)90126-8. [DOI] [PubMed] [Google Scholar]
  13. SCHERF D., CHICK F. B. Experimental parasystole. Am Heart J. 1951 Aug;42(2):212–225. doi: 10.1016/0002-8703(51)90241-4. [DOI] [PubMed] [Google Scholar]
  14. SURAWICZ B., MACDONALD M. G. VENTRICULAR ECTOPIC BEATS WITH FIXED AND VARIABLE COUPLING. INCIDENCE, CLINICAL SIGNIFICANCE AND FACTORS INFLUENCING THE COUPLING INTERVAL. Am J Cardiol. 1964 Feb;13:198–208. doi: 10.1016/0002-9149(64)90174-2. [DOI] [PubMed] [Google Scholar]

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