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Related Concept Videos

Decreased pulse rate01:14

Decreased pulse rate

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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...
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Dysrhythmias IV: Characteristics of Bradyarrhythmias01:18

Dysrhythmias IV: Characteristics of Bradyarrhythmias

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Bradyarrhythmias are cardiac rhythm disorders characterized by a slower-than-normal heart rate, typically defined as fewer than 60 beats per minute. Some of which are discussed here:Sinus BradycardiaSinus bradycardia presents a heart rate lower than 60 beats per minute, with a regular rhythm originating from the SA node. The ECG typically shows normal P waves preceding each QRS complex, a normal PR interval (0.12 to 0.20 seconds), and a normal QRS duration (0.06 to 0.10 seconds).First-Degree AV...
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Dysrhythmias VI: Management of Dysrhythmias01:25

Dysrhythmias VI: Management of Dysrhythmias

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Dysrhythmia management involves a multifaceted approach, incorporating pharmacological treatments, medical procedures, surgical interventions, lifestyle modifications, and patient education.Pharmacological ManagementAntiarrhythmic Drugs:Class I (Sodium Channel Blockers): This class includes quinidine and procainamide, which reduce the speed of impulse conduction in the heart, stabilize the cardiac membrane, and control arrhythmias. Quinidine and procainamide are Class IA agents that prolong the...
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Cardiomyopathy II: Dilated Cardiomyopathy01:30

Cardiomyopathy II: Dilated Cardiomyopathy

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Dilated cardiomyopathy, or DCM, is a progressive myocardial disorder characterized by ventricular chamber dilation and contractile dysfunction.EtiologyVarious factors can cause DCM, including hypertension and heavy alcohol intake, which contribute to the weakening and enlargement of the heart muscle. Viral infections, such as Coxsackievirus B, adenoviruses, and influenza, can lead to DCM by causing inflammation and damage to heart tissue. Certain chemotherapeutic agents, including daunorubicin,...
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Pulse rhythm01:30

Pulse rhythm

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Pulse rhythm refers to the pattern of pulsations within specific intervals, offering valuable insights into the regularity or irregularity of the heart's beats as observed through the pattern of pulsation within specific intervals. A regular pulse exhibits a consistent heart rate with uniform waveforms and pulsation force, variations of which can be classified as normal, weak, or bounding.
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Mitral Valve Prolapse II: Assessment and Management01:22

Mitral Valve Prolapse II: Assessment and Management

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IntroductionA range of clinical features characterizes Mitral Valve Prolapse (MVP), but it is important to note that many individuals with MVP are asymptomatic and may remain so throughout their lives. For those who do exhibit symptoms, the following are the key clinical features:Palpitations: This is a common symptom where individuals feel an irregular or rapid heartbeat. Palpitations in MVP are often due to arrhythmias such as premature ventricular contractions or supraventricular...
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A New Single Chamber Implantable Defibrillator with Atrial Sensing: A Practical Demonstration of Sensing and Ease of Implantation
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Recurrent Syncope in Patients With Reflex Syncope Treated With Dual-Chamber Pacemakers: Short-Term Associated

Thai Duy Vo1,2, Ngoc Dung Kieu2, Le Uyen Phuong Tran2

  • 1Pham Ngoc Thach University of Medicine Ho Chi Minh City Vietnam.

Journal of Arrhythmia
|December 29, 2025
PubMed
Summary

Recurrent syncope after dual-chamber pacemaker implantation is predicted by female sex, greater blood pressure drops, and a history of more syncope episodes. These factors help identify patients at higher risk for syncope recurrence.

Keywords:
blood pressure dropdual‐chamber pacemakerrecurrent syncopereflex syncopetilt‐table test

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Area of Science:

  • Cardiology
  • Medical Devices
  • Clinical Predictors

Background:

  • Dual-chamber pacemakers with anti-reflex syncope algorithms are used for recurrent syncope.
  • Efficacy in younger patients and non-type 2B syncope is uncertain.
  • Clinical predictors for syncope recurrence post-implantation are not well-established.

Purpose of the Study:

  • To identify clinical factors associated with early syncope recurrence in patients with reflex syncope.
  • To evaluate the effectiveness of dual-chamber pacemakers with anti-syncope functionality.
  • To establish predictors for syncope recurrence post-pacemaker implantation.

Main Methods:

  • Retrospective cohort study of 117 patients with reflex syncope.
  • All patients received dual-chamber pacemakers.
  • Primary endpoint: syncope recurrence within 6 months.

Main Results:

  • 12.8% of patients experienced syncope recurrence within 6 months.
  • Independent predictors of recurrence included female sex, systolic blood pressure differential, and number of prior syncope episodes.
  • Cox model revealed significant associations (p<0.05) for all three variables.

Conclusions:

  • Recurrent syncope within 6 months is associated with female sex, larger systolic blood pressure differentials, and higher pre-implantation syncope burden.
  • These factors can help predict recurrence risk in patients with reflex syncope.
  • Further research may refine patient selection for pacemaker therapy.