Case report: diagnosis of chronic Chagas cardiomyopathy using a multimodality imaging approach.

Background: In the USA, ∼300 000 people are affected by Chagas heart disease, a growing, but commonly overlooked, public health issue. Chagas as a potential aetiology of dilated cardiomyopathy remains under-recognized. We present a case where multimodality imaging was essential in the diagnosis and management of Chagas heart disease. Case summary: A 54-year-old man, originally from Mexico, presented to the emergency department with chest pain and recurrent syncopal episodes, found to be in haemodynamically unstable ventricular tachycardia (VT) requiring urgent cardioversion. Urgent coronary angiography revealed no obstructive disease. A transthoracic echocardiogram revealed moderately reduced left ventricular systolic function (left ventricular ejection fraction 35-40%) with apical akinesis and an aneurysm of the apical septum. Cardiac magnetic resonance (CMR) confirmed a prominent apical aneurysm with dyskinesis of the apical septum, with the evidence of transmural myocardial late gadolinium enhancement of the entire left ventricular apex and a small apical thrombus. Serologic testing was positive for Trypanosoma cruzi IgG antibody, which was confirmed on repeat testing at the Centers for Disease Control and Prevention. Patient underwent VT ablation and was discharged on guideline-directed medical therapy including a regimen of anticoagulation, beta-blocker, and angiotensin-converting enzyme inhibitor therapies. He has had no subsequent syncope or VT. Discussion: Chagas heart disease remains under-recognized and under-diagnosed despite the growing burden of T. cruzi infection in the USA. Suspicion for Chagas heart disease should be considered in patients presenting with heart failure symptoms and ventricular arrhythmias with the right corresponding history and imaging findings on echocardiogram and CMR.

STEMI interventions--a review of relevant clinical trials.

Major advances have been made in primary reperfusion and adjunctive therapies for STEMI. Mechanical reperfusion therapy has become the preferred reperfusion strategy for patients with STEMI. Outcomes have improved with the use of stents, platelet inhibitors, and with increased experience, and there is a promise that outcomes can become even better with new methods to enhance myocardial reperfusion and reduce reperfusion injury and with new anticoagulants and drug-eluting stents. Recent trends from the NRMI have shown that the frequency of use of primary PCI has increased and has surpassed lytic therapy, but primary PCI is used to treat only a minority of patients with STEMI. The major challenge for clinicians in the next decade will be to find new ways to make mechanical reperfusion more available, improve outcomes through the use of optimal adjuvant therapies and improved systems of care to speed primary PCI. The nation-wide effort to reduce door-to-balloon times has been launched by American Heart Association, with goal of making primary PCI more available to patients with STEMI.