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Dysrhythmias V: Evaluating Dysrhythmias01:30

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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

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Estimating Bilateral Atrial Function by Cardiovascular Magnetic Resonance Feature Tracking in Patients with Paroxysmal Atrial Fibrillation
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The decrease in peak atrial longitudinal strain in patients with atrial fibrillation as a practical parameter for

Jo-Nan Liao1, Tze-Fan Chao1, Chung-Lieh Hung2

  • 1Division of Cardiology, Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan; Institute of Clinical Medicine, Cardiovascular Research Center, National Yang Ming Chiao Tung University, Taipei, Taiwan.

Heart Rhythm
|January 1, 2021
PubMed
Summary

Decreased left atrial strain (LA strain) in atrial fibrillation (AF) patients predicts stroke risk. Stratifying patients by LA strain levels allows for better prognostication of ischemic stroke events.

Keywords:
Atrial fibrillationLA deformationSpeckle trackingStandard scoreStroke

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Area of Science:

  • Cardiology
  • Echocardiography
  • Medical Imaging

Background:

  • Decreased peak left atrial longitudinal strain (LA strain) is common in atrial fibrillation (AF) patients.
  • Reduced LA strain is linked to an increased risk of ischemic stroke.

Purpose of the Study:

  • To evaluate the predictive value of decreased LA strain in patients with AF.
  • To determine if LA strain stratification can aid in prognostication of stroke risk.

Main Methods:

  • Echocardiography was used to assess LA strain in 1364 AF patients.
  • Patients were categorized into five groups based on their standard LA strain score (ZLA).
  • The primary endpoint was the occurrence of ischemic stroke during follow-up.

Main Results:

  • No strokes occurred in patients with ZLA scores of 0 to -2 (Z0 and Z-1 groups).
  • Higher stroke rates were observed in lower ZLA groups (Z-2, Z-3, Z-4).
  • Compared to the Z-2 group, Z-3 and Z-4 groups showed significantly increased stroke risk (HR 3.7 and 6.4, respectively), independent of other factors.

Conclusions:

  • Reduced LA strain is a significant, independent predictor of stroke in AF patients.
  • Stratifying AF patients by LA strain levels offers a valuable tool for stroke risk prognostication.