Criteria, old and new, for differentiating between ectopic ventricular beats and aberrant ventricular conduction in the presence of atrial fibrillation

Marriott, Henry J.L.; Sandler, Israel

doi:10.1016/s0033-0620(66)80019-1

Cited by 95 publications

(14 citation statements)

References 10 publications

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“…The vectors of initial deflection were clearly different in QRS complexes of normal vs. abnormal groups (fig. 1); this observation, together with the presence of extremely long preceding cycle length, meets criteria presented for the identification of ectopic (as opposed to aberrantly conducted) electrical activity [7,8]. In fact, these abnormal complexes were re garded as the product of ventricular escape phenomena.…”

Section: Methodsmentioning

confidence: 61%

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Systolic Time Intervals in Induced Atrial Fibrillation in the Dog: Effects of Ectopic Ventricular Activation

Knudson¹,

Amend²,

Stone³

1978

Cardiology

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Electrocardiogram, atrial electrogram, phonocardiogram, aortic pressure, and left ventricular pressure were recorded during periods of induced atrial fibrillation in dogs anesthetized with a combination of morphine sulfate and pentobarbital sodium. Data were accumulated by selecting 50 cardiac cycles which terminated in ectopic ventricular electrical complexes, and comparing systolic time intervals (STI) following these beats with STI following 50 normal ventricular complexes. Ectopic ventricular activation prolonged left ventricular pre-ejection period and external isovolumic contraction time, and reduced duration of left ventricular ejection time. These events resemble changes in STI observed following induction of atrial fibrillation from a sinus rhythm, but they are of significantly greater magnitude than the effects of atrial fibrillation alone.

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Section: Methodsmentioning

confidence: 61%

“…Reference has been made to prolonged preceding cycle length and differences in initial deflection vectors [7,8] as criteria indicating ectopic rather than aberrant origin of the abnormal QRS complexes. When STI were compared under these circumstances, it was found that LVPEP and EICT were prolonged in duration, and the LVET was shortened.…”

Section: Discussionmentioning

confidence: 99%

Systolic Time Intervals in Induced Atrial Fibrillation in the Dog: Effects of Ectopic Ventricular Activation

Knudson¹,

Amend²,

Stone³

1978

Cardiology

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“…4b), the evidence is strongly in favor of aberration. If the pattern is of RBBB configuration, an ini tial deflection unmistakably identical in all available leads with that of known con ducted beats affords another powerful clue to aberration [17]. In lead V6, the absence of a q wave, fol lowed by a relatively small r wave and a deeper, wider S wave (rS pattern) is much in favor of ventricular ectopy [1,7,8,10,15,18] (fig.…”

Section: Electrocardiographic Cluesmentioning

confidence: 99%

Differential Diagnosis of Supraventricular and Ventricular Tachycardia

Marriott¹

1990

Cardiology

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Few if any medical decisions are of more urgent importance than the accurate discrimination between ventricular tachycardia and supraventricular tachycardia with ventricular aberration, and probably no common diagnosis is more often missed. Yet the distinction can often be readily made with a knowledge of the several clues here described. These include QRS morphology, polarity and width; and clinical or electrocardiographic evidence of independent atrial activity. Knowledge and application of these serviceable clues should enable the clinician to establish a correct diagnosis in 90% of wide-QRS tachycardias without resorting to invasive studies.

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“…These are discussed below as groups 2A, B, C, D, and E. Furthermore, it is to be noted that the supraventricular beats do not differ significantly in QRS configuration, even when their degree of prematurity and length of the preceding RR interval are comparable to those of beats of groups A-E. Thus, aberrancy as the cause of the abnormal QRS configurations of groups A-E can almost certainly be excluded (Marriott and Sandler, 1966;Singer and Ten Eick, 1971).…”

mentioning

confidence: 99%

Multifocal ventricular parasystolic tachycardia.

Medina¹

1976

Heart

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Criteria, old and new, for differentiating between ectopic ventricular beats and aberrant ventricular conduction in the presence of atrial fibrillation

Cited by 95 publications

References 10 publications

Systolic Time Intervals in Induced Atrial Fibrillation in the Dog: Effects of Ectopic Ventricular Activation

Systolic Time Intervals in Induced Atrial Fibrillation in the Dog: Effects of Ectopic Ventricular Activation

Differential Diagnosis of Supraventricular and Ventricular Tachycardia

Multifocal ventricular parasystolic tachycardia.

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