Myocardial ischemia during intravenous DSA in patients with cardiac disease

Area of Science:

• Cardiology
• Radiology
• Medical Imaging

Background:

• Prospective study on 48 angina patients undergoing digital subtraction angiography (DSA).
• Cardiac disease severity assessed using American Heart Association (AHA) functional classification.
• Patients received multiple injections of hypertonic ionic contrast media (diatrizoate meglumine and diatrizoate sodium).

Observation:

• Patients in AHA functional Classes I/II showed 11% angina and 32% ischemic ECG changes post-DSA.
• Patients in AHA functional Class III experienced 63% angina and 58% ischemic ECG changes.
• One patient in Class IV developed ventricular fibrillation after contrast injection.

Findings:

• Hypertonic ionic contrast media administered via bolus injection can induce adverse cardiac events.
• Increased frequency and severity of cardiac events correlate with higher functional class of cardiac disease.
• Ischemic ECG changes and angina are significant post-procedural observations.

Implications:

• Intravenous DSA examinations require stringent precautions for high-risk cardiac patients.
• Risk-benefit assessment is critical before performing DSA on patients with severe angina.
• Further research into safer contrast agents or administration protocols for vulnerable populations is warranted.