PMID- 2465423
OWN - NLM
STAT- MEDLINE
DCOM- 19890403
LR  - 20190817
IS  - 0047-1828 (Print)
IS  - 0047-1828 (Linking)
VI  - 52
IP  - 11
DP  - 1988 Nov
TI  - Day-to-day variation of the frequency of ventricular premature contractions 
      depends on variation of heart rates.
PG  - 1231-9
AB  - To examine the manner in which spontaneous variation in the frequency of 
      ventricular premature contractions (VPCs) relates to the variation of heart rate 
      (HR), 68 patients with frequent VPCs were studied, by using 24-hour ECG 
      recordings. All patients had more than 40 VPCs/hour on an initial 24-hour ECG 
      recording and a second recording was made within 2 months (mean: 15 days). For 
      each patient, the HR-dependency of VPCs was evaluated. Plots of VPC frequency per 
      minute (VPCs/min) vs. HR were made at 1-beat/min steps for all HRs recorded for 
      at least 5 min during 24 hours. Based on the patterns of correlation between 
      VPCs/min and HR observed at the first recording, patients were divided into 2 
      groups: 1) 26 with a positive correlation or the P group (a linear increase in 
      VPCs/min with increasing HRs) and 2) 42 with a non-positive correlation or the NP 
      group. The NP group included: 1) an increased VPCs/min at low HRs and a decrease 
      at high HRs (38 patients), 2) a linear decrease in VPCs/min with increased HRs (2 
      patients) and 3) constant VPCs/min at all HRs (2 patients). The patterns of 
      correlation were reproducible at the second recording period in 65 of 68 patients 
      (96%). Variability in the VPC frequency per 24 hours between two 24-hour 
      recording periods was significantly greater in the P than in the NP group, while 
      the variability in the mean daily HR was similar between the 2 groups. Thus, the 
      95% confidence limit for spontaneous reduction in the VPC frequency was greater 
      for the P (67%) than for the NP group (50%).(ABSTRACT TRUNCATED AT 250 WORDS)
FAU - Tsumabuki, S
AU  - Tsumabuki S
AD  - Department of Laboratory Medicine, Medical College of Oita, Japan.
FAU - Ito, M
AU  - Ito M
FAU - Arita, M
AU  - Arita M
FAU - Saikawa, T
AU  - Saikawa T
FAU - Ito, S
AU  - Ito S
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - Japan
TA  - Jpn Circ J
JT  - Japanese circulation journal
JID - 7806868
SB  - IM
MH  - Adult
MH  - Aged
MH  - Cardiac Complexes, Premature/*physiopathology
MH  - Circadian Rhythm
MH  - *Electrocardiography
MH  - Female
MH  - *Heart Rate
MH  - Humans
MH  - Male
MH  - Middle Aged
MH  - *Monitoring, Physiologic
EDAT- 1988/11/01 00:00
MHDA- 1988/11/01 00:01
CRDT- 1988/11/01 00:00
PHST- 1988/11/01 00:00 [pubmed]
PHST- 1988/11/01 00:01 [medline]
PHST- 1988/11/01 00:00 [entrez]
AID - 10.1253/jcj.52.1231 [doi]
PST - ppublish
SO  - Jpn Circ J. 1988 Nov;52(11):1231-9. doi: 10.1253/jcj.52.1231.