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PURPOSE To retrospectively identify pulmonary arterial (PA) flow parameters measured with phase-contrast magnetic resonance (MR) imaging that allow noninvasive diagnosis of chronic PA hypertension (PAH). MATERIALS AND METHODS The study was HIPAA compliant and was approved by the institutional review board; a waiver of informed consent was obtained.(More)
To assess the diagnostic accuracy of 16-detector-row computed tomography (16DCT) of the heart in the assessment of myocardial perfusion and viability in comparison to stress perfusion magnetic resonance imaging (SP-MRI) and delayed-enhancement magnetic resonance imaging (DE-MRI). A number of 30 patients underwent both 16DCT and MRI of the heart.(More)
OBJECTIVES Multidetector-row computed tomography coronary images are usually analyzed in mid-diastole (MD). Because of slow coronary motion also in end-systole (ES), we evaluated the impact on image quality of including ES images and defined an efficient reconstruction protocol. MATERIAL AND METHODS In 50 coronary multidetector-row computed tomography(More)
OBJECTIVES This study assessed the efficacy of oral etilefrine (10 mg three times a day) in preventing a positive response to head-up tilt testing. BACKGROUND Previous reports have suggested that oral etilefrine can be effective either in preventing a positive response to head-up tilt testing or in reducing syncopal recurrences in patients with vasovagal(More)
"Less aggressive" burst stimulation is more effective in terminating spontaneous monomorphic ventricular tachycardia with a lesser acceleration rate. Higher ventricular tachycardia cycle length and use of 91% coupling interval were independent predictors for pacing termination.
OBJECTIVES This study was designed to determine the efficacy of intravenous amiodarone in the management of recent-onset atrial fibrillation. BACKGROUND The optimal approach for acute atrial fibrillation has not been established. Amiodarone is a unique antiarrhythmic agent with activity in both supraventricular and ventricular tachyarrhythmias, but its(More)
BACKGROUND Noninvasive imaging can detect early atherosclerotic disease. Magnetic resonance imaging (MRI), because of its excellent spatial resolution, is already established as a tool for plaque characterization. Sixteen-slice, multidetector-row computed tomography (MDCT) was recently introduced into the field of cardiac imaging, with promising results for(More)
Decreased myocardial attenuation on contrast-enhanced multidetector computed tomography (MDCT) images can be observed in subjects with myocardial infarctions (MIs). It was hypothesized that myocardial hypoattenuation in MDCT can accurately detect the presence of a healed MI as determined by cardiac magnetic resonance delayed hyperenhancement (CMR-DH).(More)
Crucial advances in our understanding of the pathogenesis of atherothrombosis, defined as atherosclerosis and its thrombotic complications, have been achieved during the past two decades. The historical hypothesis of pathogenesis ("lipid accumulation") has evolved to integrate several factors contributing to the initiation and evolution of this complex(More)