Cardiac catheterization in morbidly obese patients

Area of Science:

• Cardiology
• Medical Imaging
• Obesity Medicine

Background:

• The diagnostic accuracy of cardiac catheterization and coronary angiography in morbidly obese patients with suspected coronary heart disease (CHD) requires further investigation.
• Morbid obesity is defined as a body mass ≥ 145 kg and body mass index ≥ 40 kg/m².

Purpose of the Study:

• To evaluate the safety and effectiveness of cardiac catheterization in morbidly obese patients.
• To compare the diagnostic accuracy of noninvasive tests versus cardiac catheterization for CHD in this population.

Main Methods:

• Retrospective analysis of 4,978 patients undergoing diagnostic cardiac catheterization.
• Identification of 110 morbidly obese patients for comparative analysis.
• Assessment of noninvasive test sensitivity and specificity for CHD in morbidly obese patients.

Main Results:

• Morbidly obese patients had a lower prevalence of CHD (45%) compared to other patients (72%), indicating a higher rate of false positive noninvasive tests.
• Noninvasive tests demonstrated low sensitivity (75%) and specificity (39%) for CHD in this cohort.
• Cardiac catheterization in morbidly obese patients utilized radial access (66%) and femoral closure devices (24%) more frequently.
• Complication rates (major and minor) were similar between morbidly obese and non-obese patient groups.

Conclusions:

• Cardiac catheterization, particularly with radial artery access or femoral closure devices, is a safe and effective method for evaluating CHD in morbidly obese individuals.
• Noninvasive testing for CHD in morbidly obese patients is often inconclusive and can be misleading.
• Diagnostic cardiac catheterization offers a more definitive assessment of coronary heart disease in the morbidly obese population.