Natural time course of myocardial infarction at delayed enhancement magnetic resonance.

The case reported, who suffered prolonged coronary occlusion, was evaluated by repeated MRI images in the acute, subacute and chronic phase. Scans showed hemorrhagic myocardial infarction and massive endothelial injury and its evolution over time.

Cardiogenic shock developing in the coronary care unit in patients with ST-elevation myocardial infarction.

Introduction: A relevant proportion of patients with ST-segment elevation myocardial infarction may develop cardiogenic shock after presentation, and the identification of these patients would be very important in order to improve their outcome. The aim of the current study was to identify, among patients in the BLITZ-1, the clinical predictors, and describe the outcome of patients who developed cardiogenic shock during hospitalization.

Methods: The study was a nationwide survey of patients admitted to a coronary care units for an acute myocardial infarction with or without ST-segment elevation myocardial infarction in October 2001.

Myocardial late gadolinium enhancement in specific cardiomyopathies by cardiovascular magnetic resonance: a preliminary experience.

Late gadolinium enhancement cardiovascular magnetic resonance (CMR) can visualize myocardial interstitial abnormalities. The aim of this study was to assess whether regions of abnormal myocardium can also be visualized by late enhancement gadolinium CMR in the specific cardiomyopathies. A retrospective review of all referrals for gadolinium CMR with specific cardiomyopathy over 20 months.

Quantification of myocardial perfusion using dynamic 64-detector computed tomography.

Objectives: The purpose of this study was to determine the ability of dynamic 64 slice multidetector computed tomography (d-MDCT) to provide an accurate measurement of myocardial blood flow (MBF) during first-pass d-MDCT using semiquantitative and quantitative analysis methods.

Materials And Methods: Six dogs with a moderate to severe left-anterior descending artery stenosis underwent adenosine (0.14 mL .

Morphologic validation of reperfused hemorrhagic myocardial infarction by cardiovascular magnetic resonance.

The purposes of this study were to assess the ex vivo cardiovascular magnetic resonance (CMR) signals of pathologically proved hemorrhagic myocardial infarction (MI) and to correlate these with in vivo CMR findings. Late gadolinium hypoenhancement within a hyperenhanced area in reperfused acute MI is ascribed to severe microvascular obstruction. The hearts of 2 patients, who died from cardiogenic shock after acute MIs and who had undergone coronary recanalization and in vivo CMR, were examined by T(2) and T(1) late enhancement sequences as well as by gross and histologic investigation.

Contrast-enhanced cardiovascular magnetic resonance in primary and ischemic dilated cardiomyopathy.

Objectives: Differentiation between primary dilated cardiomyopathy and ischemic cardiomyopathy has an important clinical significance. Contrast-enhanced cardiovascular magnetic resonance can play a role in this task, identifying myocardial scarring or fibrosis as presence of delayed enhancement. The aim of the present study was to evaluate the diagnostic potential of contrast-enhanced cardiovascular magnetic resonance in differentiating dilated cardiomyopathy from ischemic cardiomyopathy.

Multidetector computed tomography myocardial perfusion imaging during adenosine stress.

Objectives: The purpose of this study is to validate the accuracy of multidetector computed tomography (MDCT) to measure differences in regional myocardial perfusion during adenosine stress in a canine model of left anterior descending (LAD) artery stenosis, during first-pass, contrast-enhanced helical MDCT.

Background: Myocardial perfusion imaging by MDCT may have significant implications in the diagnosis and treatment of coronary artery disease.

Methods: Eight dogs were prepared with a LAD stenosis, and contrast-enhanced MDCT imaging was performed 5 min into adenosine infusion (0.

Contrast-enhanced multidetector computed tomography viability imaging after myocardial infarction: characterization of myocyte death, microvascular obstruction, and chronic scar.

Background: The ability to distinguish dysfunctional but viable myocardium from nonviable tissue has important prognostic implications after myocardial infarction. The purpose of this study was to validate the accuracy of contrast-enhanced multidetector computed tomography (MDCT) for quantifying myocardial necrosis, microvascular obstruction, and chronic scar after occlusion/reperfusion myocardial infarction.

Methods And Results: Ten dogs and 7 pigs underwent balloon occlusion of the left anterior descending coronary artery (LAD) followed by reperfusion.