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[Evaluation of early hemodynamic changes in the carotid arteries after permanent pacemaker implantation with color

Tülay Ozer1, Kemal Arda, Mustafa Soylu

  • 1Türkiye Yüksek Ihtisas Hastanesi Radyoloji Kliniği, Ankara, Turkey.

Tanisal Ve Girisimsel Radyoloji : Tibbi Goruntuleme Ve Girisimsel Radyoloji Dernegi Yayin Organi
|April 1, 2004
PubMed

Insights

Pacemaker implantation significantly reduced carotid artery systolic velocity, but not flow volume. This suggests early neurological dysfunction after pacemaker placement is unlikely due to carotid artery function changes.

Area of Science:

  • Cardiovascular Medicine
  • Neurology
  • Medical Imaging

Background:

  • Pacemaker implantation is a common procedure for treating bradycardia.
  • Carotid arteries are crucial for supplying blood to the brain.
  • Understanding the impact of pacemakers on cerebral blood flow is important for patient safety.

Purpose of the Study:

  • To evaluate the effect of permanent pacemaker implantation on carotid artery hemodynamics.
  • To assess changes in blood flow velocity and indices in carotid arteries post-pacemaker placement.

Main Methods:

  • Color Doppler ultrasonography was used to examine bilateral carotid arteries in 12 patients before and after pacemaker implantation.
  • Measurements included maximum systolic velocity, end diastolic velocity, mean velocity, resistivity index, and pulsatility index.
  • Flow volume and area were calculated, and data were analyzed using paired samples t-test.

Main Results:

  • Heart rates were significantly higher before pacemaker implantation.
  • Maximum systolic velocity in common and internal carotid arteries decreased significantly post-pacemaker implantation (p<0.01 for common, p<0.05 for internal).
  • Resistivity and pulsatility indices of common and internal carotid arteries also decreased significantly (p<0.05).

Conclusions:

  • The observed decrease in carotid artery systolic velocity post-pacemaker implantation may be linked to reduced cardiac output or bradycardia treatment.
  • Carotid artery flow volumes remained unchanged, suggesting early neurological dysfunction is unlikely related to carotid artery functional failure.
Abstract

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