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Related Concept Videos

Pulse rhythm01:30

Pulse rhythm

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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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 of...
Electrocardiogram Fundamentals01:28

Electrocardiogram Fundamentals

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Holter Monitor: 24-Hour Monitoring01:23

Holter Monitor: 24-Hour Monitoring

Holter monitoring is a continuous electrocardiography (ECG) recording that tracks the heart's electrical activity over an extended period, generally 24 to 48 hours. This noninvasive diagnostic tool detects irregular heart rhythms that may not be captured during a standard ECG performed in a clinical setting.DeviceThe Holter monitor is a portable, small device connected to several electrodes on the patient's chest. These electrodes detect the heart's electrical signals and transmit them to the...
Cardiac Catheterization III: Left Heart Catheterization01:24

Cardiac Catheterization III: Left Heart Catheterization

Left heart catheterization is an invasive diagnostic procedure used to evaluate the function and structure of the left side of the heart. It is generally performed to diagnose and treat cardiovascular conditions such as valve abnormalities, coronary artery disease, and congenital heart defects.Diagnostic and therapeutic purposesLeft heart catheterization serves various diagnostic and therapeutic purposes, including:Assessing coronary artery bypass grafts.Evaluating coronary artery disease in...
Dysrhythmias V: Evaluating Dysrhythmias01:30

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...

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Related Experiment Video

Updated: Jul 20, 2026

Catheter Ablation in Combination With Left Atrial Appendage Closure for Atrial Fibrillation
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Total Atrial Conduction Time as a Predictor of Left Atrial Functional Recovery in Atrial Fibrillation.

Hikari Seki1, Koki Nakanishi2, Masao Daimon3

  • 1Department of Cardiovascular Medicine, The University of Tokyo, Tokyo, Japan.

JACC. Advances
|September 17, 2025
PubMed
Summary

Preprocedural PA-TDI duration predicts left atrial (LA) functional recovery after catheter ablation (CA) in atrial fibrillation (AF) patients. This measurement, combined with baseline LA reservoir strain, enhances prediction of post-ablation LA function.

Keywords:
PA-TDI durationatrial fibrillationcatheter ablationleft atrial functionspeckle-tracking echocardiography

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Area of Science:

  • Cardiology
  • Echocardiography
  • Electrophysiology

Background:

  • Catheter ablation (CA) improves left atrial (LA) function in atrial fibrillation (AF) patients, but recovery varies.
  • PA-TDI duration, a measure of LA electrical and structural remodeling, is assessed via tissue Doppler imaging.

Purpose of the Study:

  • To determine if preprocedural PA-TDI duration can predict LA functional recovery post-CA.
  • To evaluate the predictive value of PA-TDI duration for LA functional recovery.

Main Methods:

  • 109 AF patients undergoing first CA were studied.
  • Preprocedural PA-TDI duration was measured using tissue Doppler imaging.
  • LA reservoir strain (LARS) was assessed via speckle-tracking echocardiography before and 6 months after CA.

Main Results:

  • PA-TDI duration was significantly associated with LARS at 6 months post-CA, independent of other factors.
  • LARS significantly improved 6 months after CA (P < 0.001).
  • Combining baseline LARS and PA-TDI duration enhanced prediction of postprocedural LA function (P < 0.001).

Conclusions:

  • PA-TDI duration is a valuable predictor of LA functional recovery in AF patients after CA.
  • This echocardiographic parameter aids in assessing potential LA functional improvement post-ablation.