The Role of FDG-PET in Patients with Epilepsy Related to Periventricular Nodular Heterotopias: Diagnostic Features and Long-Term Outcome.

Background And Purpose: Periventricular nodular heterotopias (PNHs) are frequently associated with drug-resistant epilepsy (DRE). Although magnetic resonance imaging (MRI) can define the morphological features of PNHs, still there is a need to assess their metabolic activity in order to provide useful information on epileptogenicity and long-term outcome. To that end, we investigated the ability of F-FDG PET to identify seizure onset zone in order to assess the metabolic activity of the ectopic neurons and to provide prognostic information on the postsurgical outcome.

Predictive and prognostic value of left ventricular mechanical dyssynchrony assessed by myocardial perfusion single photon emission computed tomography in asymptomatic patients under hemodialysis.

Background: Patients under hemodialysis (HD) have an increased risk of major adverse cardiac events (MACEs). In these patients, myocardial perfusion scintigraphy (MPS) provides useful prognostic information. Left ventricular mechanical dyssynchrony (LVD) has been proven to predict all-cause death in patients under HD.

Functional derangement and cardiac innervation in the apical ballooning syndrome: a 123I-meta-iodobenzylguanidine scintigraphic and dobutamine stress echocardiographic study.

Several cases of transient left ventricular apical ballooning syndrome have already been described, but the pathophysiological mechanisms of this syndrome still remain unclear. We report the case of a patient evaluated in the acute phase of apical ballooning by coronary angiography and echocardiography who was submitted to I-meta-iodobenzylguanidine (MIBG) myocardial scintigraphy and dobutamine stress echocardiography one month after the discharge. MIBG scintigraphy demonstrated a decreased tracer uptake in the apical and periapical anterior regions, whilst myocardial perfusion at rest was normal.

Early detection of cardiac dysfunction in thalassemic patients by radionuclide angiography and heart rate variability analysis.

Background: Cardiac dysfunction remains the major cause of death in beta-thalassemia. Aim of this study was to assess early myocardial damage in thalassemic patients with no symptoms or echocardiographic evidence of dysfunction at routine monitoring.

Methods: Twenty patients (seven females; median 25 yr [first quartile 22,third quartile 28]) with beta-thalassemia underwent radionuclide angiography (RNA) at rest and during low-dose dobutamine infusion (5-10 gamma/kg/min).

Usefulness of chronotropic incompetence to dipyridamole in predicting myocardial perfusion defects in heart transplant recipients.

The aim of this report was to assess the relation between heart rate response to dipyridamole infusion and perfusion defects at quantitative sestamibi single-photon emission computed tomographic imaging. We demonstrated in 166 heart transplant recipients that chronotropic incompetence to dipyridamole is the only significant and independent predictor of perfusion defects.