维护LVEF的患者的右心室上角节奏:不良影响和机制
Tasneem Z Naqvi1, Shuang Liu1, Oral Waldo1
1Department of Cardiology, Mayo Clinic, Phoenix & Scottsdale, Arizona, USA.
JACC. Advances
|August 29, 2025
概括
在正常左心室排气分数 (LVEF) 的患者中,右心室 (RV) 的高节奏负担 (≥50%) 与左心室功能减弱和心力衰竭住院增加有关. 这项研究突出了VR的长期心脏风险.
科学领域:
- 心脏病学
- 电生理学
- 心脏节拍
背景情况:
- 在正常左心室射出分数 (LVEF) 的患者中,右心室 (RV) 节奏的长期不良心脏影响尚不清楚.
- 了解这些影响对于优化节奏策略和患者结果至关重要.
研究的目的:
- 在基线LVEF正常的患者中评估VR顶部节奏的不良影响.
- 确定RV节奏负荷对心脏静脉缩和腹功能,机械失调,心脏衰竭住院和全因死亡率的影响.
主要方法:
- 对VR顶部心脏起器植入和LVEF≥50%的患者的病历进行回顾.
- 在4. 98年的中位随访期内分析RV节奏负担 (<50%与≥50%).
- 评估静脉缩功能 (LVEF),静脉缩功能 (E/ e' 比率),静脉缩机械失调 (应变成像),高血压和全因死亡率.
主要成果:
- 与< 50% 的患者相比,RV 节奏负荷≥50% 的患者的LVEF 显著下降 (中位数下降6. 0% 与3. 0%,P=0. 001).
- 基线LVEF降低,基线LVEF恶化,基线E/ e'比率升高和LV机械失调是HFH的预测因素.
- 基线机械失调,恶化的失调,以及基线E/ e' 预测的全因死亡率.
结论:
- 在正常基线LVEF的患者中,慢性VR顶部节奏负荷≥50%与LV系统功能受损和LV机械失调增加有关.
- 这种更高的节奏负担显著增加了心力衰竭住院的风险.
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