Septal function during left ventricular unloading.

Background: Left ventricular (LV) unloading with mechanical support devices alters biventricular geometry and impairs right ventricular (RV) contractility, but its effect on septal systolic function remains unknown.

Methods And Results: To evaluate the effects of LV volume and pressure unloading on septal geometry and function, LV preload was abruptly reduced by clamping left atrial pressure between 0 and -2 mm Hg in seven open-chest, anesthetized dogs by use of a pressure-control servomechanism to withdraw blood from the left atrium. With left atrial pressure clamping, maximal LV pressure decreased 30 +/- 12% (mean +/- SD) (P < .

Prognostic importance of intimal thickness as measured by intracoronary ultrasound after cardiac transplantation.

Background: Although intracoronary ultrasound (ICUS) has been validated for the early detection of transplant coronary artery disease (TxCAD), the prognostic importance of findings detected by this new imaging technique is unknown.

Methods And Results: This study examined the relation of clinical outcome in 145 heart transplant recipients (mean age, 45.1 +/- 11.

Improved detection of enhancing and nonenhancing lesions of multiple sclerosis with magnetization transfer.

Purpose: To determine whether magnetization transfer imaging can improve visibility of contrast enhancement of multiple sclerosis plaques.

Methods: Fifty-nine enhancing and 63 nonenhancing lesions in 10 patients with multiple sclerosis were evaluated to calculate contrast-to-noise ratios on conventional T1-weighted and T1-weighted magnetization transfer images. The signal intensity of the lesion and the background (white matter) were measured on precontrast T1-weighted and T1-weighted magnetization transfer images (800/20/1 [repetition time/echo time/excitations]) and on postcontrast T1-weighted and T1-weighted magnetization transfer images.

Investigation of the phenylethanolamine N-methyltransferase gene as a candidate gene for hypertension.

Genetic mapping studies have located a gene, Bp1, that accounts for approximately 30% of the genetic variation in the stroke-prone spontaneously hypertensive rat (SHRSP) to a region on chromosome 10 containing the angiotensin-converting enzyme gene. In humans, the gene encoding phenylethanolamine N-methyltransferase (PNMT) was localized near the angiotensin-converting enzyme gene on human chromosome 17. Since most of human chromosome 17 is known to be homologous to rat chromosome 10 and PNMT is known to play a role in blood pressure homeostasis, we reasoned (1) that the rat gene encoding PNMT (Pnmt) may reside on chromosome 10 within the confidence interval containing Bp1 and (2) that Pnmt is a good candidate gene for Bp1.

Sumatriptan prophylaxis for postelectroconvulsive therapy headaches.

Very little has been written about headaches following electroconvulsive therapy (ECT) but the incidence has been estimated at 26%. Patients with a history of migraine occasionally have similar headaches precipitated by ECT. In addition, some patients may have headaches that persist for months after a series of ECT treatments, while some patients who have a preexisting headache problem report improvement with ECT.

A double-blind comparison of adhesive bandages with the use of uniform suction blister wounds.

Background And Design: The assessment of cutaneous wound healing in humans has been hampered by the inability to evaluate multiple wounds with identical origins, treatment histories, and sizes. There have been no double-blind wound healing studies in humans that compared one wound dressing with another. The purpose of this study was to determine if identical suction blister wounds could serve as a model to evaluate and compare wound healing and overall cosmetic appearance of wounds treated with commercially available adhesive bandages.