Case Report: Combined Ischemic Optic Neuropathy and Central Retinal Artery Occlusion after Starting Hemodialysis.

Significance: This case highlights ocular ischemia after hemodialysis resulting in permanent vision loss. Fifteen percent of the U.S.

Usefulness of multislice computed tomographic coronary angiography to identify patients with abnormal myocardial perfusion stress in whom diagnostic catheterization may be safely avoided.

Computed tomographic angiography (CTA) has been validated for noninvasive assessment of coronary anatomy. The aim was to establish whether CTA could guide the use of invasive coronary angiography (ICA) in symptomatic patients with intermediate risk after myocardial perfusion stress imaging (MPSI). From April 2005 to February 2006, patients referred for CTA to a cardiology practice were entered into a database.

Angiographic prevalence and clinical predictors of left subclavian stenosis in patients undergoing diagnostic cardiac catheterization.

The angiographic prevalence, clinical predictors, and sensitivity and specificity of a bilateral arm blood pressure differential for predicting proximal left subclavian artery stenosis were established in 492 patients undergoing cardiac catheterization. Seventeen subjects (3.5%) in the overall population and nine subjects (5.

Emergency intravascular ultrasound to locate a stent during primary angioplasty.

A 62-year-old man underwent primary PTCA with bail-out stent placement for an acute anterior wall myocardial infarction. After initial deployment of one half of a Palmaz-Schatz stent, the stent could not be visualized fluoroscopically. Emergency intravascular ultrasound (IVUS) showed the stent to be located proximal to the intended site of deployment.

Direct right ventricular puncture for hemodynamic evaluation of a mechanical tricuspid valve prosthesis: a new indication for an old procedure.

The advent of transvenous right heart catheterization has relegated direct transthoracic right ventricular puncture largely to the role of "interesting historical footnote." However, in the case of a right ventricle that is "protected" by a mechanical tricuspid valve prosthesis, direct right ventricular puncture represents a reasonable alternative for obtaining accurate hemodynamic information.