Tissue characterization of benign cardiac tumors by cardiac magnetic resonance imaging, a review of core imaging protocol and benign cardiac tumors.

Generally, cardiac masses are initially suspected on routine echocardiography. Cardiac magnetic resonance (CMR) imaging is further performed to differentiate tumors from pseudo-tumors and to characterize the cardiac masses based on their appearance on T1/T2-weighted images, detection of perfusion and demonstration of gadolinium-based contrast agent uptake on early and late gadolinium enhancement images. Further evaluation of cardiac masses by CMR is critical because unnecessary surgery can be avoided by better tissue characterization. Different cardiac tissues have different T1 and T2 relaxation times, principally owing to different internal biochemical environments surrounding the protons. In CMR, the signal intensity from a particular tissue depends on its T1 and T2 relaxation times and its proton density. CMR uses this principle to differentiate between various tissue types by weighting images based on their T1 or T2 relaxation times. Generally, tumor cells are larger, edematous, and have associated inflammatory reactions. Higher free water content of the neoplastic cells and other changes in tissue composition lead to prolonged T1/T2 relaxation times and thus an inherent contrast between tumors and normal tissue exists. Overall, these biochemical changes create an environment where different cardiac masses produce different signal intensity on their T1- weighted and T2- weighted images that help to discriminate between them. In this review article, we have provided a detailed description of the core CMR imaging protocol for evaluation of cardiac masses. We have also discussed the basic features of benign cardiac tumors as well as the role of CMR in evaluation and further tissue characterization of these tumors.

Causes of Acute Peritonitis and Its Complication.

Introduction Peritonitis is a significant cause of morbidity and mortality in surgical settings. Coexisting premorbid illness and postoperative complications were found to be associated with death. This study aimed to analyze various etiologies that cause peritonitis and shed light on the factors responsible for unsatisfactory results. Method This longitudinal study included 309 patients above 12 years of age, of either gender, with confirmed diagnosis of peritonitis. Exploratory laparotomy was done to identify the cause of peritonitis. Patients were monitored postoperatively till their discharge or death for the development of complications. Results Our results showed that the most common cause of acute peritonitis was duodenal perforation (26.2%), followed by typhoid ileal perforation (24.2%) and ruptured appendix (16.8%). At least one complication was observed in 31% of the participants. The most common complication was dehydration (18.8%), followed by septicemia (11.3%) and paralytic ileus (6.4%). Ten (3.2%) patients died in the hospital. Conclusions Acute peritonitis is a serious surgical emergency caused by a number of diseases. Early surgical treatment along with antibiotics, followed by aggressive resuscitation can yield improved outcomes in patients with peritonitis.

History of Pregnancy Loss as a Risk Factor for Myocardial Infarction.

Introduction There are few cardiovascular risk factors that are unique to females, such as after menopause, lipid profiles change unfavorably. Another risk factor that might be associated with an increased risk of cardiovascular diseases in women is the incidence of miscarriages and abortions. In this study, we will determine the association between the previous history of pregnancy loss and myocardial infarction (MI). Methods This case-control study was conducted from December 2019 to January 2021. We enrolled 600 female patients with a confirmed diagnosis of MI from the outpatient department (OPD) of the cardiology and internal medicine unit of a tertiary care hospital in Pakistan. Another 600 female participants without the diagnosis of MI were enrolled from the OPD as the control group. Participants were asked about the history of pregnancy, including the number of miscarriages, abortions, and stillbirths. Results Participants with myocardial infarction had experienced greater than one miscarriage compared to participants without MI (25.1% vs. 13.6%; p-value: <0.0001). Similarly, participants with MI had significantly more participants with stillbirth compared to participants without MI (12.0% vs. 6.66%; p-value: 0.0017). Conclusion Pregnancy loss is associated with MI in the future. Women with a history of pregnancy loss must undergo regular cardiovascular screening to protect themselves from cardiovascular events.