The Normal P-R Interval in Infants and Children

Alimurung, Mariano M.; Massell, Benedict F.

doi:10.1161/01.cir.13.2.257

Cited by 47 publications

(10 citation statements)

References 20 publications

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“…The maximum P-R interval for normal children of their age-group is 0-18 sec. for rates below 90 a minute (Alimurung and Massell, 1956). An older normal sister in this family has a P-R interval of 0-12 sec.…”

Section: Discussionmentioning

confidence: 99%

Congenital heart disease with arrhythmia in a family.

Amarasingham¹,

Fleming²

1967

Heart

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Section: Discussionmentioning

confidence: 99%

Congenital heart disease with arrhythmia in a family.

Amarasingham¹,

Fleming²

1967

Heart

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“…In order to illustrate the impact of both methods, M10 and M20, we plotted the intervals AP–VS 10 and AP–VS 20 versus the tachycardia rate in comparison to the course of normal PQ duration plus 0, 10, and 20 ms. Therefore, heart rate-related PQ durations were derived from the literature [ 16 , 17 ].…”

Section: Methodsmentioning

confidence: 99%

R-wave synchronised atrial pacing in pediatric patients with postoperative junctional ectopic tachycardia: the atrioventricular interval investigated by computational analysis and clinical evaluation

et al. 2017

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BackgroundR-wave synchronised atrial pacing is an effective temporary pacing therapy in infants with postoperative junctional ectopic tachycardia. In the technique currently used, adverse short or long intervals between atrial pacing and ventricular sensing (AP–VS) may be observed during routine clinical practice.ObjectivesThe aim of the study was to analyse outcomes of R-wave synchronised atrial pacing and the relationship between maximum tracking rates and AP–VS intervals.MethodsCalculated AP–VS intervals were compared with those predicted by experienced pediatric cardiologist.ResultsA maximum tracking rate (MTR) set 10 bpm higher than the heart rate (HR) may result in undesirable short AP–VS intervals (minimum 83 ms). A MTR set 20 bpm above the HR is the hemodynamically better choice (minimum 96 ms). Effects of either setting on the AP–VS interval could not be predicted by experienced observers. In our newly proposed technique the AP–VS interval approaches 95 ms for HR > 210 bpm and 130 ms for HR < 130 bpm. The progression is linear and decreases strictly (− 0.4 ms/bpm) between the two extreme levels.ConclusionsAdjusting the AP–VS interval in the currently used technique is complex and may imply unfavorable pacemaker settings. A new pacemaker design is advisable to allow direct control of the AP–VS interval.

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“…The statement that increased heart size from infancy to adult life is responsible for the increased length of the P-R interval that is associated with aging is frequently made in the literature (2,9). This association is doubtful on several logical grounds, including the lack of similarity between established physical growth curves and the curve for the P-R interval, which shows no adolescent increase and essentially completes its increase by the age of 10 years.…”

Section: Maxmentioning

confidence: 99%