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Dependency of premature ventricular contractions on heart rate.

Abstract：

:To identify a method for characterizing the dynamic behavior of ventricular arrhythmias at different heart rates, 201 consecutive patients with frequent premature ventricular contractions (PVCs) underwent two 24-hour electrocardiographic monitoring periods. The percentage of PVCs for each cycle length was calculated and then analyzed by linear regression analysis. On the basis of the significance of the p value, and the positive or negative value of the slope, we identified three trends: a tachycardia-enhanced pattern (p < 0.01, slope negative), a bradycardia-enhanced pattern (p < 0.01, slope positive), and an indifferent pattern (p > 0.01). During the first monitoring period, a tachycardia-enhanced pattern was present in 56 patients (28%), a bradycardia-enhanced pattern was present in 49 patients (24%), and an indifferent pattern was present in 96 patients (48%). This relationship was reproducible in 41 of the patients with a tachycardia-enhanced pattern (73%), in 29 of the patients with a bradycardia-enhanced pattern (59%), and in 70 patients with an indifferent pattern (72%). In conclusion, it is possible to identify a spontaneous trend between the incidence of ventricular arrhythmias and the length of the preceding cardiac cycle that seems to remain stable over time.

journal_name

Am Heart J

journal_title

American heart journal

authors

Pitzalis MV,Mastropasqua F,Massari F,Passantino A,Forleo C,Luzzi G,Totaro P,De Nicolò M,Rizzon P

doi

10.1016/s0002-8703(97)70203-5

subject

Has Abstract

pub_date

1997-02-01 00:00:00

pages

153-61

issue

2

eissn

0002-8703

issn

1097-6744

pii

S0002870397000239

journal_volume

133

pub_type

杂志文章

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