心脏起器植入后的QRS间隔:一个独立的死亡风险因素
1Arrhythmia Service CASMU Montevideo.
Critical pathways in cardiology
|February 20, 2025
概括
通过心脏起器植入实现狭窄的QRS持续时间 (<135ms) 显著降低了心血管死亡率. 这一发现无论患者是谁,都适用.
科学领域:
- 心脏病学 心脏病学
- 电子生理学 电子生理学
- 医疗器械技术 医疗器械技术
背景情况:
- 传统的右心室顶部节奏可以诱导左捆分支阻塞 (LBBB) 和由于QRS扩大而导致的心力衰竭.
- 左捆节奏可以改善LBBB患者,但可能不会对其他人有好处.
- 有限的数据存在于QRS缩小的好处在各种心房静脉阻塞类型.
研究的目的:
- 为了确定窄节奏的QRS持续时间是否是心脏起器接受者的死亡率的显著预测因素.
- 评估QRS缩小对生存率的影响,无论QRS形态如何.
主要方法:
- 对204名接受心脏起器植入并将置于隔膜区域的患者进行分析.
- 使用全球QRS方法评估QRS持续时间,狭窄QRS的切线为135毫秒.
- 卡普兰-梅尔生存分析用于比较狭窄和宽QRS组之间的死亡率.
主要成果:
- 在68%的患者 (140/204) 中,获得了狭窄的QRS (<135毫秒).
- 整体心血管死亡率为4.9% (10/204).
- 与广泛的QRS组相比,狭窄的QRS组观察到明显较低的死亡率.
结论:
- 狭窄的QRS持续时间是一个独立的因素,与心脏起器患者的改善生存率有关.
- 针对狭窄的QRS而定 Septal 位是降低死亡率的安全有效策略.
相关概念视频
01:25Correlation between ECG and Cardiac Cycle
3.2K
The electrical signals recorded on an electrocardiogram (ECG) occur before the mechanical processes of contraction and relaxation during the cardiac cycle.
A cardiac action potential originates in the SA node and spreads throughout the atria and the AV node in approximately 0.03 seconds. This results in the P wave in an ECG and triggers atrial contraction. The action potential is then briefly slowed at the AV node, allowing the atria to contract and fill the ventricles with blood before...
A cardiac action potential originates in the SA node and spreads throughout the atria and the AV node in approximately 0.03 seconds. This results in the P wave in an ECG and triggers atrial contraction. The action potential is then briefly slowed at the AV node, allowing the atria to contract and fill the ventricles with blood before...
3.2K
01:14Decreased pulse rate
530
Bradycardia is a medical condition in which the heart rate is slower than normal. It occurs when the heart's natural pacemaker, the sinus node, generates slower electrical impulses than the standard rhythm. In adults, bradycardia is diagnosed when the pulse rate falls below 60 beats per minute, indicating a deviation from the normal heart rate range.
There are specific risk factors that can elevate the likelihood of developing bradycardia. Advanced age is a significant factor, with...
There are specific risk factors that can elevate the likelihood of developing bradycardia. Advanced age is a significant factor, with...
530