Abstract Background: Coronary computed tomography angiography (CCTA) allows for noninvasive coronary artery disease (CAD) phenotyping. Factors related to CAD progression are epidemiologically valuable. Objective: To identify factors associated with CAD progression in patients undergoing sequential CCTA testing. Methods: We retrospectively analyzed 384 consecutive patients who had at least two CCTA studies between December 2005 and March 2013. Due to limitations in the quantification of CAD progression, we excluded patients who had undergone surgical revascularization previously or percutaneous coronary intervention (PCI) […]

Abstract Background: QRS fragmentation (fQRS) is classically defined as the presence of slurred QRS morphology in at least two contiguous leads, and its prognostic importance has been shown in ST elevation myocardial infarction (STEMI). However, no study has investigated the significance of single lead fQRS (sl-fQRS) in surface electrocardiography (ECG). Objectives: To evaluate whether sl-fQRS is as valuable as classical fQRS in patients with acute STEMI who had successful revascularization with primary percutaneous coronary intervention (pPCI). Methods: We included 330 […]

Case 55-year-old male with history of ischemic cardiomyopathy with previous percutaneous coronary intervention (PCI) in the anterior descending coronary artery (LAD) middle segment was admitted to our hospital for chest pains. A new coronary angiogram showed in-stent chronic total occlusion (ISCTO) of LAD receiving collaterals from right coronary artery (RCA). Left circumflex (LCX) was totally occluded and RCA presented a significant mid-segment lesion. Complete percutaneous revascularization was planned. First attempt to recanalize the LAD failed because the lesion obstructed the […]

Background: Functional assessment of coronary artery obstruction is used in cardiology practice to correlate anatomic obstructions with flow decrease. Among such assessments, the study of the coronary fractional flow reserve (FFR) has become the most widely used. Objective: To evaluate the correlation between FFR and findings of ischemia obtained by noninvasive methods including stress echocardiography and nuclear medicine and the presence of critical coronary artery obstruction. Methods: Retrospective study of cases treated with systematized and standardized procedures for coronary disease […]