相关实验视频
Updated: Sep 16, 2025

07:56
A Model of Long-Term Ventricular Fibrillation in Isolated Rat Hearts
Published on: February 17, 2023
1.0K
在除测试期间发现心室动的不稳定性与未来突然死亡之间的关系
Sou Otsuki1, Minori Sakurazawa1, Hironori Furuse1
1Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan.
Journal of cardiovascular electrophysiology
|July 9, 2025
概括
在植入式心脏转换器-除器 (ICD) 患者的除测试 (DT) 期间检测室 (VF) 的不稳定性预测了突然死亡 (SD) 风险. 在测试过程中这种VF检测失败表明了潜在的未来检测问题,导致SD增加.
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 医疗器械
背景情况:
- 在可植入心脏转换器-除器 (ICD) 患者中,由于室内心跳/ (VT/VF) 检测失败而导致的突然死亡 (SD) 是罕见但严重的.
- 在除测试 (DT) 期间不稳定的VF检测与随后的SD风险之间的联系仍然不清楚.
研究的目的:
- 确定DT期间的VF感知状态是否可以预测ICD或用除器 (CRT-Ds) 进行心脏再同步治疗的患者的SD.
- 评估DT期间的VF检测不稳定性是否预测临床事件期间的VT/VF检测失败.
主要方法:
- 对97名患有ICD/CRT-D (Medtronic) 的患者进行了回顾性分析,这些患者接受了DT.
- 定义"诱导VF与检测失败"作为在DT期间在VF检测间隔内感知≥4个心室跳动.
- 在DT期间检测失败和没有检测失败的患者之间的结果比较.
主要成果:
- 8% (8/97) 的患者在DT期间经历了"诱导VF与检测失败"
- 这种检测失败是SD的唯一显著预测因子 (HR 7.94,p=0.004) 在中位数9.9年的随访期间.
- 检测失败的患者有较高的SD发病率与不适当的治疗中断 (40%vs3%).
结论:
- 在DT期间的VF检测不稳定可能表明在实际临床VT/VF事件期间的传感不可靠.
- 这种不稳定性是ICD/CRT-D患者突然死亡的重要预测因素.
更多相关视频
相关概念视频
Dysrhythmias III: Characteristics of Dysrhythmias
128
Dysrhythmias, also known as arrhythmias, are irregular heart rhythms that result from abnormal electrical activity in the heart, affecting its ability to circulate blood efficiently. Tachyarrhythmias, a subset of dysrhythmias, are characterized by abnormally fast heart rates exceeding 100 beats per minute. Here are some types of tachyarrhythmias with their distinct ECG features:Sinus Tachycardia:Sinus tachycardia presents a regular heart rhythm with an increased rate of 101-180 beats per...
128
Disturbances in Heart Rhythm
1.3K
Arrhythmia or dysrhythmia refers to an abnormal heart rhythm caused by a defect in the heart's conduction system. It can cause the heart to beat irregularly, too quickly, or too slowly, leading to symptoms like chest pain, shortness of breath, and fainting. Factors such as stress, caffeine, alcohol, nicotine, cocaine, certain drugs, congenital defects, diseases, and electrolyte abnormalities can trigger arrhythmias.
Arrhythmias are categorized by their speed, rhythm, and origin. A slow heart...
Arrhythmias are categorized by their speed, rhythm, and origin. A slow heart...
1.3K
ECG Interpretation of Arrhythmias II: Atrial, Junctional and Ventricular Arrhythmias
170
Arrhythmia is a condition characterized by an irregular heart rhythm, with ECG changes that differ based on its origin and nature. The types of arrhythmias discussed below include atrial, junctional, and ventricular arrhythmias.Atrial ArrhythmiasPremature Atrial Complexes (PACs): PACs are early atrial beats caused by stress, caffeine, alcohol, electrolyte imbalances, hypoxia, hyperthyroidism, or certain medications (e.g., bronchodilators and decongestants). The ECG shows early P waves with an...
170
Dysrhythmias V: Evaluating Dysrhythmias
122
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...
122
Dysrhythmias II: Classification of Tachyarrhythmias
140
Tachyarrhythmias are a type of dysrhythmia where the heart rate exceeds 100 beats per minute. Here are some common types of tachyarrhythmias:Sinus TachycardiaSinus tachycardia originates from increased impulses from the sinus node, leading to an elevated heart rate. It is often triggered by stress, fever, or exercise.Patients may experience palpitations, a sensation of a racing heart, dizziness, and chest discomfort.Causes and Risk Factors: Common causes include physical exertion, emotional...
140
Cardiopulmonary Resuscitation III: AED Use
73
Introduction to AEDAn Automated External Defibrillator (AED) is a portable medical device that analyzes the heart's rhythm and, if necessary, delivers an electrical shock to help the heart re-establish an effective rhythm during sudden cardiac arrest (SCA). SCA occurs when the heart suddenly and unexpectedly stops beating, leading to a loss of blood flow to the brain and other vital organs. In such emergencies, time is of the essence, and using an AED, combined with Cardiopulmonary...
73

