Right ventricular dysplasia: radioisotopic angiography

Abstract

To evaluate if regional wall motion (RWM) abnormalities detected at rest in patients with high presumption of right ventricular dysplasia (RVD) are confirmed by stress test and could be considered of diagnostic value in the clinical setting of the disease, 12 patients underwent first-pass radionuclide angiography (RA) at rest and during exercise. The mean global right ventricular ejection fraction (EF) was 29.83 +/- 7.91 at rest; during exercise, we found a non-significant increase (32.16 +/- 9.8, P greater than 0.05). Six segments with systo-diastolic dyskinesis, three segments with diastolic dyskinesis, and 10 segments with akinesis at rest confirmed the same degrees of dysfunction during exercise. Eight of the 15 hypokinetic segments at rest showed normal function during exercise; the remaining seven confirmed the same degree of dysfunction during exercise. We conclude that various degrees of RWM abnormalities are found in all patients with RVD; hypokinetic dysfunction has to be confirmed by exercise. RWM abnormalities are not specific for RVD, and clinical and electrophysiological data should be combined to obtain as much evidence as possible for diagnosis.

Displasia arritmogênica do ventrículo direito

“…Angiocintigrafia cardíaca isotópica -Fornece dados sobre a contratilidade global e segmentar dos dois ventrículos 32 .…”

Arrhythmogenic Right Ventricular Dysplasia: A Review

“…The criteria for diagnosis of RVD by RNA are comparable to échocardiographie criteria [32], The added advantage of RNA is the capability to study RV under rest and stress. This may be more specific for diagnosis of RVD and can detect latent LV dysfunction, which is not rare, but may have added prognostic significance [33][34][35], While the sensitivity is good for reported studies, usually typical RVD, individual crite ria have limited diagnostic specificity on their own.…”