TY - JOUR
T1 - The relationship of late potentials to assessment of heart rate variability in post-infarction patients
AU - Kao, Tsair
AU - Hsiao, Hsiang Chiang
AU - Chiu, Hung Wen
AU - Kong, Chi Woon
N1 - Funding Information:
This study was supported in part by Grant NSC88-2213-E-010-007 from the National Science Council, ROC, and by the Medical Research and Advancement Foundation in Memory of Dr. Chi-Shuen Tsou.
Copyright:
Copyright 2007 Elsevier B.V., All rights reserved.
PY - 2000/7/31
Y1 - 2000/7/31
N2 - In order to investigate the relationship of late potential (LP) to assessment of heart rate variability (HRV) after acute myocardial infarction (AMI), we studied 101 Chinese patients with AMI (10 ± 2.4 days) in Taiwan by collecting 24-h ECG from a Holter tape recorder and signal-averaged ECG from a high-resolution ECG cart. Of the 101 patients, 36 patients had LP (LP group) and 65 patients did not (NLP group). The mean heart rate was significantly lower in the LP group than in the NLP group (P <0.05). The LP group had a significantly increased high-frequency (HF) spectral component of HRV compared with the NLP group (P <0.005), but their low-frequency (LF) to HF ratio (LF/HF) was lower (P <0.05). Analysis of the circadian variation of HRV revealed significant difference of morning SDRR (standard deviation of normal RR intervals) compared with noon SDRR (P <0.05 in the LP group, P <0.005 in the NLP group) and evening SDRR (P <0.05 in the LP group, P <0.005 in the NLP group). In the NLP group, morning HF (normalized unit, nu) was 0.258 ± 0.098 compared with noon HF (nu) of 0.219 ± 0.83 (P <0.05) and evening HF (nu) of 0.225 ± 0.085 (P <0.05). Nine patients died during follow-up from cardiac causes, three (8.3%) in the LP group and six (9.2%) in the NLP group. In post-MI patients, there was higher vagal tone in patients with late potentials compared to those without late potentials. NLP patients had more circadian change in vagal tone compared with LP patients. (C) 2000 Elsevier Science Ireland Ltd.
AB - In order to investigate the relationship of late potential (LP) to assessment of heart rate variability (HRV) after acute myocardial infarction (AMI), we studied 101 Chinese patients with AMI (10 ± 2.4 days) in Taiwan by collecting 24-h ECG from a Holter tape recorder and signal-averaged ECG from a high-resolution ECG cart. Of the 101 patients, 36 patients had LP (LP group) and 65 patients did not (NLP group). The mean heart rate was significantly lower in the LP group than in the NLP group (P <0.05). The LP group had a significantly increased high-frequency (HF) spectral component of HRV compared with the NLP group (P <0.005), but their low-frequency (LF) to HF ratio (LF/HF) was lower (P <0.05). Analysis of the circadian variation of HRV revealed significant difference of morning SDRR (standard deviation of normal RR intervals) compared with noon SDRR (P <0.05 in the LP group, P <0.005 in the NLP group) and evening SDRR (P <0.05 in the LP group, P <0.005 in the NLP group). In the NLP group, morning HF (normalized unit, nu) was 0.258 ± 0.098 compared with noon HF (nu) of 0.219 ± 0.83 (P <0.05) and evening HF (nu) of 0.225 ± 0.085 (P <0.05). Nine patients died during follow-up from cardiac causes, three (8.3%) in the LP group and six (9.2%) in the NLP group. In post-MI patients, there was higher vagal tone in patients with late potentials compared to those without late potentials. NLP patients had more circadian change in vagal tone compared with LP patients. (C) 2000 Elsevier Science Ireland Ltd.
KW - Chinese patients
KW - Heart rate variability
KW - Late potential
KW - Myocardial infarction
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U2 - 10.1016/S0167-5273(00)00281-3
DO - 10.1016/S0167-5273(00)00281-3
M3 - Article
C2 - 10962123
AN - SCOPUS:0034738406
SN - 0167-5273
VL - 74
SP - 207
EP - 214
JO - International Journal of Cardiology
JF - International Journal of Cardiology
IS - 2-3
ER -