Assessment of coronary flow reserve: comparison between contrast-enhanced magnetic resonance imaging and positron emission tomography.

Objectives: The study compared flow reserve indices by magnetic resonance imaging (MRI) with quantitative measures of coronary angiography and positron emission tomography (PET).

Background: The noninvasive evaluation of myocardial flow by MRI has recently been introduced. However, a comparison to quantitative flow measurement as assessed by PET has not been reported in patients with coronary artery disease (CAD).

[Form fruste of long QT syndrome].

The long QT syndrome (LQTS) is an inherited disorder associated with recurrent syncope and sudden death from ventricular arrhythmias. It is characterized by a prolonged QT interval on the ECG. A case is discussed in which a patient presented with recurrent syncopal episodes on exertion associated with a slightly prolonged QT interval.