American heart journal
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American heart journal · Sep 2013
High-sensitive cardiac troponin T and its relations to cardiovascular risk factors, morbidity, and mortality in elderly men.
Cardiac troponin is emerging as risk indicator in community-dwelling populations. In this study, we investigated the associations of cardiac troponin T (cTnT) to cardiovascular (CV) disease and outcome in elderly men. ⋯ In community-dwelling men, cTnT levels are associated to CV risk factors and morbidities and predict both fatal and nonfatal CV events. The relations to outcome are mainly seen in men with prevalent CV disease indicating that the prognostic value of cTnT in subjects free from CV disease is limited.
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American heart journal · Sep 2013
The left bundle-branch block puzzle in the 2013 ST-elevation myocardial infarction guideline: from falsely declaring emergency to denying reperfusion in a high-risk population. Are the Sgarbossa Criteria ready for prime time?
Prompt and accurate identification of ST-elevation myocardial infarction (STEMI) in the presence of left bundle-branch block (LBBB) remains difficult. The 2004 STEMI guideline recommended emergent reperfusion therapy to patients with suspected ischemia and new or presumably new LBBB. These recommendations have led to frequent false catheterization laboratory activation and inappropriate fibrinolytic therapy because most patients with suspected ischemia and new or presumably new LBBB do not have acute coronary artery occlusion on angiography. ⋯ Thus, we propose a diagnosis and triage algorithm incorporating the Sgarbossa criteria to quickly and accurately identify, among patients presenting with chest pain and new or presumably new LBBB, those with acute coronary artery occlusion. This is a high-risk population in which reperfusion therapy would be denied by the 2013 STEMI guideline. Our algorithm will also significantly reduce false catheterization laboratory activation and inappropriate fibrinolytic therapy, the inevitable consequence of the 2004 STEMI guideline.
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American heart journal · Sep 2013
Association between septal strain rate and histopathology in symptomatic hypertrophic cardiomyopathy patients undergoing septal myectomy.
Hypertrophic cardiomyopathy (HCM) is histopathologically characterized by myocyte hypertrophy, disarray, interstitial fibrosis, and small intramural coronary arteriole dysplasia, which contribute to disease progression. Longitudinal systolic and early diastolic strain rate (SR) measurements by speckle tracking echocardiography are sensitive markers of regional myocardial function. We sought to determine the association between septal SR and histopathologic findings in symptomatic HCM patients who underwent surgical myectomy. ⋯ In HCM patients, there is inverse association between various histopathologic findings and septal SR. Strain rate might potentially provide further insight into HCM pathophysiology.
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American heart journal · Aug 2013
High-sensitivity cardiac troponin T in prediction and diagnosis of myocardial infarction and long-term mortality after noncardiac surgery.
Perioperative myocardial infarction (MI) is a serious complication after noncardiac surgery. We hypothesized that preoperative cardiac troponin T detected with a novel high-sensitivity (hs-cTnT) assay will identify patients at risk for acute MI and long-term mortality after major noncardiac surgery. ⋯ In this cohort of high-risk patients, preoperative hs-cTnT concentrations were significantly associated with postoperative MI and long-term mortality after noncardiac surgery.