BACKGROUND AND OBJECTIVESNo data are available in Saudi Arabia on the relationship between coronary artery calcification (CAC) and myocardial perfusion scintigraphy (MPS) in asymptomatic women, for determining subclinical coronary artery disease (CAD). The main objective of this study was to investigate the relationship between the presence of CAC and stress-induced myocardial ischemia by MPS in asymptomatic women.DESIGN AND SETTINGSingle-center retrospective study over a 2-year period.METHODSOne hundred and one women (mean [SD] age, 56 [11] years) without known CAD underwent both MPS and CAC scanning within 3 months. The frequency of ischemia by MPS was compared with the presence or absence of CAC and the number of CAD risk factors.RESULTSThe prevalence of ischemic MPS was 22% (22/101). Among the 22 patients with ischemic MPS, the CAC score was 0 in 5 patients of 22 (23%), 1 to 200 in 4 patients of 22 (18%), and more than 200 in 13 patients of 22 (59%) (P=.0001). In contrast, among the 79 patients with normal MPS, the CAC score was 0 in 44 of 79 (56%) patients, 1 to 200 in 25 of 79 (32%), and more than 200 in 10 of 79 (13%). The presence or absence of CAC was the single most important predictor of the MPS result (P=.0001).CONCLUSIONSModerate to severe CAC is associated with ischemic MPS in more than 50% of asymptomatic women with 2 or more CAD risk factors. Abnormal MPS is rarely associated with a 0 CAC score. Normal MPS does not exclude subclinical CAD. Therefore, CAC screening is an appropriate initial screening test for CAD in asymptomatic women.

The Water Alternating Gas flooding method aims to improve sweep efficiency during CO2 flooding. This study has screened three waterflooded sandstone reservoirs for CO2 injection to apply the Stalkup Model. An empirical correlation is derived from the Stalkup Model parameters Sorw, Sob, Sorm, and HCPVI to ease estimation of the recovery factor calculation process. The empirical correlation is called the WAG correlation. The hydrocarbon recovery percent calculations of the reservoirs after 1.2 HCPVI were as following; for reservoir (A), the Stalkup Model provided a recovery percentage of 10.00% against the WAG correlation value of 9.30%. In reservoir (B), Stalkup Model calculations gave 6.00% compared to 6.40% from WAG correlation. Finally, in reservoir (C) the calculation showed a 7.00% form Stalkup Model and 6.40% from WAG correlation. The estimated average error for the three reservoirs was 7.4%.

Ventricular free wall rupture is a rare post myocardial complication with a high associated mortality. In this article we discuss the case of an elderly patient who presented to our emergency department in shock after an episode of syncope. Using Point Of Care Ultrasound (POCUS), identification of cardiac tamponade and pericardial thrombus was possible, signs indicating a diagnosis of free wall rupture. Early initiation of transfer proceedings to a tertiary cardio-thoracic unit was therefore possible, resulting in a positive patient outcome.