Short-term efficacy and safety of cardiac contractility modulation in patients with heart failure
10.3760/cma.j.cn112148-20231009-00274
- VernacularTitle:心肌收缩调节器在心力衰竭患者中的短期有效性及安全性研究
- Author:
Yankai GUO
1
;
Shuai SHANG
;
Tianheng SUN
;
Yongqiang FAN
;
Jiasuoer XIAOKERETI
;
TuErhong Kela ZU
;
Xu YANG
;
Ling ZHANG
;
Yaodong LI
;
Yanmei LU
;
Jianghua ZHANG
;
Qiang XING
;
Xianhui ZHOU
;
Baopeng TANG
Author Information
1. 新疆医科大学第一附属医院心脏中心起搏电生理科 新疆心电生理与心脏重塑重点实验室，乌鲁木齐 830054
- Keywords:
Heart failure;
Cardiac contractility modulation;
6-minute walk test
- From:
Chinese Journal of Cardiology
2024;52(4):391-396
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To investigate the short-term efficacy and safety of cardiac contractility modulation (CCM) in patients with heart failure.Methods:This was a cross-sectional study of patients with heart failure who underwent CCM placement at the First Affiliated Hospital of Xinjiang Medical University from February to June 2022. With a follow-up of 3 months, CCM sensation, impedance, percent output, and work time were monitored, and patients were compared with pre-and 3-month postoperative left ventricular ejection fraction (LVEF) values, and 6-minute walk test distance and New York Heart Association (NYHA) cardiac function classification, and the occurrence of complications was recorded.Results:CCM was successfully implanted in all 9 patients. Seven(7/9) of them were male, aged (56±14) years, 3 patients had ischaemic cardiomyopathy and 6 patients had dilated cardiomyopathy. At 3-month postoperative follow-up, threshold was stable, sense was significantly lower at follow-up than before (right ventricle: (16.3±7.0) mV vs. (8.2±1.1) mV, P<0.05; local sense: (15.7±4.9) mV vs. (6.7±2.5) mV, P<0.05), and impedance was significantly lower at follow-up than before (right ventricle (846±179) Ω vs. (470±65) Ω, P<0.05, local sense: (832±246) Ω vs. (464±63) Ω, P<0.05). The CCM output percentage was (86.9±10.7) %, the output amplitude was (6.7±0.4) V, and the daily operating time was (8.6±1.0) h. LVEF was elevated compared to preoperative ((29.4±5.2) % vs. (38.3±4.3) %, P<0.05), the 6-minute walk test was significantly longer than before ((96.8±66.7)m vs. (289.3±121.7)m, P<0.05). No significant increase in the number of NYHA Class Ⅲ-Ⅳ patients was seen (7/9 vs. 2/9, P>0.05). The patient was not re-hospitalised for worsening heart failure symptoms, had no malignant arrhythmic events and experienced significant relief of symptoms such as chest tightness and shortness of breath. No postoperative complications related to pocket hematoma, pocket infection and rupture, electrode detachment, valve function impairment, pericardial effusion, or cardiac perforation were found. Conclusions:CCM has better short-term safety and efficacy in patients with heart failure.
