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[Myocardial revascularization in patients with impaired left ventricular function]
M A Mariani1, F Donatelli, S Pelenghi
1Istituto per le Malattie dell'Apparato Cardiovascolare e Respiratorio, IRCCS H San Raffaele, Università degli Studi, Milano.
Cardiologia (Rome, Italy)
|March 1, 1994
Summary
Preoperative [18F]FDG/PET imaging helps identify viable myocardium in patients with left ventricular dysfunction undergoing coronary artery bypass grafting. This technique guides surgical decisions, improving outcomes for coronary artery disease patients.
Area of Science:
- Cardiology
- Nuclear Medicine
- Cardiac Surgery
Background:
- Coronary artery disease (CAD) and left ventricular dysfunction (LVD) pose significant challenges in surgical decision-making.
- Accurate assessment of myocardial viability is crucial for optimizing outcomes in patients with reduced ejection fraction (EF).
- Radionuclide imaging techniques like SPECT and PET offer insights into myocardial perfusion and metabolism.
Purpose of the Study:
- To evaluate the utility of [18F]FDG/PET in identifying viable myocardium in patients with LVD considered for coronary surgery.
- To assess the impact of [18F]FDG/PET-guided surgical decisions on patient outcomes.
- To compare preoperative and postoperative myocardial perfusion and EF in different patient groups.
Main Methods:
- Seventy-four patients with LVD underwent [99mTc]MIBI/SPET for perfusion assessment and radionuclide angiography for EF.
- [18F]FDG/PET was performed in 44 patients under fasting and pharmacologic washout conditions to assess myocardial viability.
- Patients were categorized into three groups based on surgical intervention and FDG uptake: Group A (operated without PET), Group B (operated with FDG uptake), and Group C (excluded due to no FDG uptake).
Main Results:
- No significant differences in age, sex, CAD type, risk factors, or baseline EF were observed between Groups A, B, and C.
- Group C patients, showing no FDG uptake in dysfunctional segments, were excluded from surgery.
- Postoperative assessment of perfusion and EF was conducted 6 months after surgery for Groups A and B.
Conclusions:
- Preoperative [18F]FDG/PET imaging is valuable in selecting patients with LVD for coronary surgery by identifying viable myocardium.
- Exclusion of patients with absent FDG uptake in dysfunctional segments may prevent unnecessary surgical interventions.
- Further studies are needed to correlate these findings with long-term clinical outcomes.