INTRODUCTION AND OBJECTIVES Non-invasive coronary artery angiography by 16 multidetector-row spiral computed tomography is a novel diagnostic tool whose reliability is still unclear. The aim of our study was to compare this technique with invasive coronary angiography. PATIENTS AND METHOD A total of 31 selected patients were examined with both angiographic methods. Non-invasive studies were p...

A tenet of contemporary obstetrics is that events that compromise placentation increase the risk of complications of pregnancy and contribute to poor pregnancy outcome. In particular, conditions that affect the invasion of placental cells and remodeling of uterine spiral arteries compromise placental function and the subsequent development of the fetus. Extravillous trophoblast cells (EVTs) pro...

Since the introduction of the original singlesection computed tomography (CT) machines, and more recent spiral CT, several different types of CT artefact have been described. Recognized artefacts include motion artefact, metallic streak artefact, beam hardening, partial volume artefact and step artefact. The use of contrast-enhanced spiral CT has created many new artefacts and potential pitfall...

A fused triplet placenta was observed in a Wistar Hannover rat on gestation day 15. Each (referred to as PL-A, PL-B, and PL-C) of this attached one fetus each, but their fetal weights were lower than that the only normal PL-N) dam. Histopathologically, thinning trophoblastic septa dilatation maternal sinusoid labyrinth zone PL-B PL-C, not PL-A or PL-N. The points placental fusion at junctional ...

This study presents an innovative and simple way to increase the rate of heat transfer in a spiral plate heat exchanger model. Several circular cross-section rods, as continuous vortex generators, have been inserted within the spiral plate heat exchanger in the cross-stream plane. The vortex generators are located at various azimuth angles of α=30◦, 60◦, 90◦, and 120◦ with non-dimensional diame...

A36-year-old woman with a 3-week history of shortness of breath was admitted to the hospital after having suffered syncope. She also complained of left-sided leg pain. Duplex ultrasound revealed a right-sided proximal deep venous thrombosis and an occluded left popliteal artery. Echocardiography demonstrated a dilated right ventricle and tricuspid regurgitation with an estimated pulmonary systo...

OBJECTIVE To assess the causes and manner of custodial deaths in Karachi, and to determine the factor of negligence on the part of the custodians behind such deaths. METHODS The cross-sectional study involved the deaths in custody undergoing autopsy at Civil Hospital, Karachi, from January 2005 to December 2010. Autopsy was followed by histological examination, X-ray or CT scan wherever requi...

on the circular curve, lateral acceleration affects comfort. on the spiral, both lateral acceleration and jerk affect comfort.  the determination of maximum curving speed on the basis of lateral acceleration only is not critical because the lateral acceleration is proportional to the square of speed whereas jerk is proportional to cubic power of speed. the maximum speed on a curve is thus signi...

Doppler interrogation of the uterine arteries provides information on the physiologic transformation of the spiral arteries during pregnancy. Lack or suboptimal conversion of such arteries by the late second or third trimester of pregnancy is a strong indicator of increased risk for adverse pregnancy outcome, in particular, iatrogenic prematurity due to severe fetal growth restriction or preecl...

BACKGROUND Coronary artery disease (CAD) is the most common cause of hospitalization and mortality in many industrialized countries. We analysed the diagnostic accuracy of multi-detector row spiral computed tomography (MDCT) in determining mid- to high-grade coronary artery stenoses (> 50%). METHODS Sixty-nine patients with suspected CAD were referred to MDCT coronary angiography. Patients wi...