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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.
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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...
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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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Heart Failure V: Medical Management01:30

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Medical Management of Acute Decompensated Heart Failure (ADHF)The primary goals of therapy for patients hospitalized with acute decompensated heart failure (ADHF) include:Relieving symptomsOptimizing volume statusSupporting oxygenation and ventilationMaintaining cardiac output (CO) and end-organ perfusionIdentifying and addressing the cause of ADHFPreventing complicationsProviding patient education on factors precipitating HF exacerbationPlanning for dischargeOngoing monitoring and assessment...
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Heart Failure II: Pathophysiology01:29

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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...
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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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Heart Rate Decrease After Atrial Fibrillation Catheter Ablation Predicts Decompensated Heart Failure After the

Yasuhiro Matsuda1, Masaharu Masuda1, Takashige Sakio1

  • 1Kansai Rosai Hospital Cardiovascular Center Amagasaki Japan.

Circulation Reports
|October 28, 2022
PubMed
Summary
This summary is machine-generated.

A decrease in heart rate after atrial fibrillation (AF) ablation is linked to decompensated heart failure (DHF). This finding highlights a key predictor for DHF in AF patients post-catheter ablation.

Keywords:
Atrial fibrillationCatheter ablationComplicationsDecompensated heart failureHeart rate

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Area of Science:

  • Cardiology
  • Electrophysiology

Background:

  • Decompensated heart failure (DHF) is a known complication of catheter ablation for atrial fibrillation (AF).
  • Understanding predictors of DHF is crucial for patient management post-ablation.

Purpose of the Study:

  • To investigate the association between heart rate changes and the occurrence of DHF in patients undergoing AF catheter ablation.
  • To identify heart rate dynamics as a potential predictor for DHF following AF ablation procedures.

Main Methods:

  • A cohort of 1,004 consecutive patients undergoing initial AF ablation was studied.
  • Heart rate was monitored before and after the ablation procedure.
  • DHF was defined as heart failure requiring medical therapy within 48 hours post-procedure.

Main Results:

  • The incidence of DHF was 2% (22 patients).
  • Patients who developed DHF had a significantly greater decrease in heart rate post-ablation compared to those who did not (-21±29 vs. 2±21 beats/min; P=0.001).
  • A greater post-ablation heart rate decrease was an independent predictor of DHF (HR 0.8; P=0.004).

Conclusions:

  • Post-ablation heart rate reduction is an independent predictor of DHF in AF patients.
  • Monitoring heart rate changes after AF ablation may help identify patients at risk for DHF.