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Pattern of perfusion defects seen in ischemic heart disease patients on technetium (Tc99m) tetrofosmin scanning

Abdul Rahman1, Jawed Aftab, Rehan Majeed

  • 1Department of Cardiology, Ziauddin Medical University, Karachi, Pakistan.

Journal of Ayub Medical College, Abbottabad : JAMC
|December 3, 2005
PubMed

Insights

Technetium tetrofosmin (Tc99m) SPECT imaging identified ischemic changes in 35 patients with suspected heart disease. Reversible ischemia and mixed defects were most common in the inferior wall, while fixed defects appeared at the left ventricular apex.

Area of Science:

  • Nuclear Cardiology
  • Cardiovascular Imaging
  • Radiopharmaceuticals

Background:

  • Cardiovascular disease is a leading cause of mortality globally.
  • Atherosclerosis, or coronary artery narrowing, is the primary cause of ischemic heart disease.
  • Accurate detection of ischemic changes is crucial for patient management.

Purpose of the Study:

  • To determine the pattern of ischemic changes using technetium tetrofosmin (Tc99m) SPECT imaging.
  • To evaluate the diagnostic utility of Tc99m tetrofosmin in ischemic heart disease.
  • To analyze the distribution and types of perfusion defects.

Main Methods:

  • Sixty-five patients with known or suspected ischemic heart disease were included.
  • Tc99m tetrofosmin stress and rest myocardial perfusion imaging was performed.
  • A one-day protocol was utilized for the tetrofosmin studies.

Main Results:

  • SPECT Tc99m tetrofosmin imaging revealed perfusion defects in 35 out of 65 patients.
  • A total of 95 perfusion defects were analyzed.
  • Reversible and mixed ischemic defects were predominantly observed in the inferior wall.

Conclusions:

  • The inferior wall frequently exhibited reversible and mixed perfusion defects.
  • Fixed defects were most commonly identified in the left ventricular apex.
  • Tc99m tetrofosmin SPECT imaging effectively characterizes ischemic patterns in the heart.
Abstract

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