ABSTRACT
Thrombotic left main coronary artery (LMCA) occlusions usually manifest as acute coronary syndrome (ACS) with cardiogenic shock, acute pulmonary edema, cardiac arrest, fatal arrhythmias or sudden cardiac death. There is no clinically predictor for LMCA thrombosis and no consensus regarding the optimal treatment. In the current literature, treatment options include emergency coronary artery bypass grafting (CABG), stent implantation, intracoronary thrombolysis, anticoagulation with heparin or glycoprotein IIb/IIIa inhibitors, thrombus aspiration as reperfusion strategies. Recently, successful results have been reported with low dose, slow infusion tPA for treatment of LMCA thrombus that allowing coronary flow. This regime may be a new treatment idea in only hemodynamically stable patients. Prospective studies and common consensus are needed about the low dose, slow infusion tPA treatment regime and optimal treatment for thrombotic LMCA obstructions.
ABSTRACT
ABSTRACT Objective Several studies have shown that left ventricular (LV) dysfunction is increased in individuals with diabetes. However, there are scarce data about LV function in prediabetics. This study assessed the early changes in LV diastolic and systolic myocardial function in normotensive prediabetics using tissue Doppler echocardiography (TDE). Subjects and methods We evaluated 94 patients with prediabetes (mean age of 50.8 ± 6.9 years, 78 female) without known cardiovascular diseases and 70 healthy volunteers with similar demographic characteristics. Systolic and diastolic function of the left ventricle was evaluated with transthoracic echocardiography according to the latest consensus recommendations including TDE. Results The mean results of septal and lateral parts of the mitral annulus Pulsed wave TDE showed that myocardial systolic wave (Sm), myocardial early diastolic wave (Em) and Em to atrial peak velocity (Am) ratio were significantly lower whereas early diastolic peak flow velocity (E) to Em ratio, myocardial isovolumetric relaxation time (IVRTm), myocardial isovolumetric contraction time (IVCTm) and myocardial performance index (MPI) values were significantly higher in patients with prediabetes (preDM). In addition, mean left atrium (LA) diameter measured with M-mode echocardiography was significantly higher in prediabetics than controls. Conclusion PreDM is associated with subclinical LV systolic and diastolic dysfunction as evaluated by TDE.