Extreme externalisation of a Riata defibrillator lead conductor cable with prolapse into the left pulmonary artery.

The Riata family of defibrillator leads (St. Jude Medical, Sylmar, CA) has been recalled because of externalisation of conductor cables and increased electrical failure. We describe the case of a man with an incidental finding of extreme externalisation of a conductor from the right ventricular defibrillator lead (Riata family) with prolapse into the left pulmonary artery.

Mechanisms of increased right and left ventricular oxygen uptake during inotropic stimulation.

Aims: Few studies have investigated oxygen supply/demand relations in right ventricle (RV). The current study compared changes in myocardial oxygen uptake (MVO2) and its determinants, myocardial blood flow (MBF) and oxygen extraction (EO2), in RV and left ventricle (LV) during stimulation with inotropic drugs.

Main Methods: Twenty-one anesthetized dogs were studied.

The false assumption of lung cancer based upon a positive positron emission tomographic scan.

Objective: To show that positron emission tomography (PET) can have false positive results from inflammatory lesions.

Methods: We present a complicated, elderly patient who underwent an extensive work-up that failed to provide a diagnosis for a radiographic abnormality.

Results: A PET scan was positive and the patient was believed to have lung carcinoma until eventual surgical excision was performed.