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[Left ventricular reduction surgery: pre- and postoperative evaluation by cine MRI]
D E Kivelitz1, H Hotz, A C Borges
1Institut für Radiologie, Humboldt-Universität, Berlin. dietmar.kivelitz@charite.de
Rofo : Fortschritte Auf Dem Gebiete Der Rontgenstrahlen Und Der Nuklearmedizin
|May 23, 2001
Summary
Cine magnetic resonance imaging (MRI) effectively assesses patients before and after left ventricular (LV) reduction surgery. This cardiac MRI technique reliably shows improved heart function and structure post-operation.
Area of Science:
- Cardiovascular Imaging
- Medical Technology
Background:
- Left ventricular (LV) reduction surgery is a complex procedure for cardiomegaly.
- Accurate preoperative assessment and postoperative monitoring are crucial for patient outcomes.
Purpose of the Study:
- To evaluate the utility of cine magnetic resonance imaging (MRI) in the preoperative assessment of patients undergoing LV reduction surgery.
- To assess the role of cine MRI in the early postoperative follow-up of these patients.
Main Methods:
- Six patients with cardiomegaly underwent cine MRI on a 1.5 T scanner before and after LV reduction surgery.
- Breath-hold, ECG-triggered cine gradient-echo sequences were used for imaging along short and long axes.
- Ventricular and valvular morphology, function (ejection fraction), and volumes (end-diastolic, end-systolic) were assessed.
Main Results:
- Postoperative ejection fraction significantly increased from 21.7% to 33.4% (p < 0.05).
- Left ventricular volumes and myocardial mass significantly decreased post-surgery (p < 0.05).
- Cine MRI reliably identified postoperative valve morphology, mitral valve insufficiency, and ventricular thrombus.
Conclusions:
- Cine MRI is a valuable tool for preoperative evaluation in LV reduction surgery.
- Cine MRI effectively monitors functional and morphological changes in the early postoperative period.