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Laser Doppler flow for the hemodynamic differentiation of tachycardia

Emilia Stegemann1,2, Mia Weidmann3, Alejandra A Miyazawa4

  • 1Clinic for Internal Medicine & Angiology, Agaplesion Diakonie Kliniken Kassel, Kassel, Germany.

Pacing and Clinical Electrophysiology : PACE
|November 17, 2022
PubMed

Insights

Laser Doppler flowmetry effectively monitors hemodynamic changes during arrhythmias, outperforming heart rate alone. This tissue perfusion measure could improve implantable cardioverter defibrillators (ICDs) by reducing inappropriate shocks.

Area of Science:

  • Cardiology
  • Biomedical Engineering
  • Medical Devices

Background:

  • Implantable cardioverter defibrillators (ICDs) prevent sudden cardiac death (SCD) from ventricular arrhythmias.
  • Inappropriate shocks from ICDs negatively impact patient survival and quality of life.
  • Hemodynamic monitoring may help differentiate clinically significant arrhythmias.

Purpose of the Study:

  • To evaluate laser Doppler flowmetry for assessing hemodynamic effects of paced atrial and ventricular arrhythmias.
  • To use mean arterial blood pressure as a reference for hemodynamic assessment.

Main Methods:

  • Acute human study during electrophysiological procedures.
  • Simultaneous acquisition of laser Doppler flowmetry, arterial blood pressure, and ECG during high-rate atrial and ventricular pacing.
  • Pacing simulated supraventricular and ventricular tachycardias.

Main Results:

  • Strong correlation between arterial blood pressure and laser Doppler flow signals during pacing (rho = 0.694, p < .001).
  • Greater hemodynamic impairment observed during ventricular pacing compared to atrial pacing (-1.0% vs. 19.0%, p < .001).
  • Laser Doppler flowmetry demonstrated superior ability to detect hemodynamic impairment compared to heart rate alone.

Conclusions:

  • Laser Doppler flowmetry tissue perfusion is a reliable surrogate for arterial pressure in acute settings.
  • This technology holds potential for integration into future ICDs to enhance arrhythmia discrimination.
Abstract

Keywords:
LDFhemodynamic sensorimplantable cardioverter defibrillatorinappropriate shocksudden cardiac death

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