相关实验视频

Updated: Jan 7, 2026

Impact of Intracardiac Neurons on Cardiac Electrophysiology and Arrhythmogenesis in an Ex Vivo Langendorff System

Impact of Intracardiac Neurons on Cardiac Electrophysiology and Arrhythmogenesis in an Ex Vivo Langendorff System

Published on: May 22, 2018

左心室喷射分数和发生的心脏导电功能障碍:探索电生理学参数的调解效应

Qie Zhang¹, Feilong Zhang¹, Yuhao Hu¹

¹Department of Cardiology, National Cardiovascular Disease Regional Center for Anhui, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China.

Annals of noninvasive electrocardiology : the official journal of the International Society for Holter and Noninvasive Electrocardiology, Inc

|December 28, 2025

概括

较高的左心室喷射分数 (LVEF) 独立预测心脏导电功能障碍 (CCD) 的风险较低. 电生理学参数部分调解了这种关联,突出了机电合的重要性.

科学领域:

心脏病学心脏病学
电子生理学电子生理学
生物医学工程生物医学工程

背景情况:

预测心脏导电功能障碍 (CCD) 和电生理学调解的左心室射出分数 (LVEF) 的基于人口的数据有限.
了解LVEF和事件CCD之间的关系对于心血管健康至关重要.
这项研究研究了LVEF的预测作用和大队列中电生理学参数的潜在调解.

研究的目的:

为了确定LVEF是否能在大量人群中预测事件CCD.
探索PQ间隔,QRS持续时间和纠正的QT间隔在LVEF-CCD关系中的中介作用.
为了阐明心肌机电合的临床相关性.

主要方法:

对32,398名英国生物库参与者进行前性队列研究,使用LVEF和ECG数据.
事件CCD被定义为新发病的心房膜阻塞,左束枝阻塞或其他导电障碍.
使用了考克斯回归,灵敏度分析和中介分析 (PQ,QRS,QT间隔).

主要成果:

在约7年的随访期间,共确定了484起CCD病例.
每一次1SD增加的LVEF与17%的CCD风险降低有关 (aHR=0.83,p<0.001).
PQ间隔,QRS持续时间和纠正的QT间隔分别介于LVEF-CCD关联的6%,17%和-3%.

结论:

LVEF是事件CCD的独立预测器.
电生理学参数部分调解了LVEF和CCD之间的关联.
这些发现强调了心肌机电合在人口健康中的临床意义.

关键词:

电生理学参数电生理学参数发生的心脏导电功能障碍.左心室喷射分数的部分.调解因素的调解因素预测价值是一个预测值.

更多相关视频

Evaluation of Left Ventricular Structure and Function using 3D Echocardiography

Evaluation of Left Ventricular Structure and Function using 3D Echocardiography

Published on: October 28, 2020

Testing the Efficacy of Pharmacological Agents in a Pericardial Target Delivery Model in the Swine

Testing the Efficacy of Pharmacological Agents in a Pericardial Target Delivery Model in the Swine

Published on: July 7, 2016

相关概念视频

Electrophysiology of Normal Cardiac Rhythm

Electrophysiology of Normal Cardiac Rhythm

The normal cardiac rhythm is a synchronized electrical activity that facilitates the regular and coordinated contraction of the heart muscle. This process is essential for efficient blood circulation throughout the body. The fundamental elements involved in establishing and maintaining this rhythm include the unique electrical properties of cardiac muscle cells, the sinoatrial (SA) node's pacemaker function, the specialized conducting system, and the ionic mechanisms underlying each phase...

Electrocardiogram

Electrocardiogram

An electrocardiogram (ECG or EKG) is a critical diagnostic tool that records the electrical signals produced by the heart during each heartbeat. This recording is achieved through electrodes placed strategically on the arms, legs, and chest. The electrocardiograph amplifies these signals and produces 12 distinct tracings, offering a comprehensive understanding of the heart's electrical activity.
Three major waveforms are present in a typical ECG recording: the P wave, the QRS complex, and...

Pathophysiology of Cardiac Performance

Pathophysiology of Cardiac Performance

Typical heart performance is influenced by heart rate, rhythm, myocardial contraction, and metabolism or blood flow. The cardiac muscle exhibits distinct electrophysiological features, including pacemaker activity and calcium channel control, which play a vital role in the heart's response to various drugs. The autonomic nervous system, comprising the sympathetic and parasympathetic branches, regulates heart rate. Sympathetic activation increases heart rate, while parasympathetic activation...

Dysrhythmias V: Evaluating Dysrhythmias

Dysrhythmias V: Evaluating Dysrhythmias

Dysrhythmias, also known as arrhythmias, are disturbances in the heart's rhythm that range from benign to life-threatening. A thorough evaluation is crucial for appropriate management and involves a comprehensive medical history, physical examination, and various diagnostic tests.Medical HistorySymptoms: Collect detailed information on palpitations, dizziness, syncope, chest pain, and fatigue. Note their onset, frequency, and triggers.Previous Cardiac Issues: Document any history of heart...

Heart Failure II: Pathophysiology

Heart Failure II: Pathophysiology

Systolic Heart Failure and Compensatory MechanismsSystolic heart failure (also termed HFrEF, Heart Failure with Reduced Ejection Fraction) is the most prevalent type of heart filure. It results in a decreased volume of blood being pumped from the ventricle. The aortic arch and carotid sinuses have baroreceptors that detect reduced blood pressure, triggering the sympathetic nervous system (SNS) to release epinephrine and norepinephrine. Initially, this response aims to boost heart rate and...

Pathophysiology of Heart Failure

Pathophysiology of Heart Failure

Heart failure (HF) is a progressive syndrome involving ventricles that leads to inadequate cardiac output. It can be classified based on location and output or ejection fraction. Ejection fraction (EF) is an essential measurement in the diagnosis and surveillance of HF. Reduced EF corresponds to systolic heart failure (HFrEF). However, HF with preserved ejection fraction (HFpEF) is becoming increasingly prevalent. Also known as diastolic HF, this form of HF is related to aging. The...