Clinical applications of cardiac magnetic resonance imaging after repair of tetralogy of Fallot

In the past 15 years, cardiovascular magnetic resonance (MR) has evolved in to an imaging technique that provides adequate, and in part unique, informa tion on residual problems in the follow-up of patients operated for tetralo gy of Fallot. Spin-echo or gradient-echo cine magnetic resonance imaging al low detailed assessment of intracardiac and large vessel anatomy, which is particularly helpful in Fallot patients with residual abnormalities of righ t ventricular outflow and/or pulmonary artery. Multisection gradient-echo c ine MRI can be used to obtain accurate measurements of biventricular size, ejection fraction, and wall mass. This allows serial follow-up of biventric ular function. MR velocity mapping is the only imaging technique available that provides practical quantification of pulmonary regurgitation volume. M R velocity mapping can also be used to quantify right ventricular diastolic function in the presence of pulmonary regurgitation.