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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...
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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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Cardiac imaging studies encompass a wide range of noninvasive and minimally invasive techniques designed to visualize the heart's structure and function in detail. One such technique is echocardiography, which uses high-frequency ultrasound waves to produce detailed images of the heart, known as echocardiograms.
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Related Experiment Video

Updated: Jul 29, 2025

Real-Time Cardiac Mapping with a Noninvasive Imageless Electrocardiographic Imaging System
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Strain Imaging and Ventricular Arrhythmia.

Caroline Løkke Bjerregaard1,2, Kristoffer Grundtvig Skaarup1,2, Mats Christian Højbjerg Lassen1,2

  • 1Department of Cardiology, Copenhagen University Hospital-Herlev and Gentofte, 2900 Hellerup, Denmark.

Diagnostics (Basel, Switzerland)
|May 27, 2023
PubMed
Summary
This summary is machine-generated.

Identifying patients at risk for sudden cardiac death is crucial. This review explores how cardiac strain imaging, a sensitive technique, can better predict ventricular arrhythmias than ejection fraction, aiding implantable cardioverter-defibrillator selection.

Keywords:
arrhythmiadyssynchronymechanical dispersionmyocardial workstrain

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Area of Science:

  • Cardiology
  • Medical Imaging
  • Cardiac Electrophysiology

Background:

  • Ventricular arrhythmia is a primary cause of sudden cardiac death.
  • Current risk assessment relies on left ventricular ejection fraction, which has limitations.
  • Accurate risk stratification is needed to identify candidates for implantable cardioverter-defibrillators.

Purpose of the Study:

  • To review the potential of cardiac strain imaging techniques in predicting ventricular arrhythmias.
  • To highlight strain measures as alternatives to ejection fraction for risk stratification.
  • To discuss the role of speckle-tracking echocardiography in identifying patients at risk.

Main Methods:

  • Review of existing literature on strain imaging and ventricular arrhythmias.
  • Focus on speckle-tracking echocardiography and its derived strain measures.
  • Comparison of strain imaging with ejection fraction in risk prediction.

Main Results:

  • Strain imaging, including global longitudinal strain and mechanical dispersion, is a sensitive method for detecting systolic dysfunction.
  • These strain measures show promise in identifying patients at risk for ventricular arrhythmias.
  • Cardiac mechanics assessed by strain imaging offer a more detailed view than ejection fraction.

Conclusions:

  • Strain imaging techniques offer a more sensitive assessment of cardiac function compared to ejection fraction.
  • Novel strain measures hold significant potential for improving the prediction of ventricular arrhythmias.
  • Further research into strain imaging can optimize the selection of patients for implantable cardioverter-defibrillators.