111 research outputs found
T2-Weighted Cardiac Magnetic Resonance Imaging of Edema in Myocardial Diseases
The purpose of this paper is to describe imaging techniques and findings of T2-weighted magnetic resonance imaging (MRI) of edema in myocardial diseases. T2-weighted cardiac MRI is acquired by combining acceleration techniques with motion and signal suppression techniques. The MRI findings should be interpreted based on coronary artery supply, intramural distribution, and comparison with delayed-enhancement MRI. In acute myocardial diseases, such as acute myocardial infarction and myocarditis, the edema is larger than myocardial scarring, whereas the edema can be smaller than the scarring in some types of nonischemic cardiomyopathy, including hypertrophic cardiomyopathy. T2-weighted MRI of edema identifies myocardial edema associated with ischemia, inflammation, vasculitis, or intervention in the myocardium and provides information complementary to delayed-enhancement MRI
IMPACT OF LEFT VENTRICULAR DYSSYNCHRONY ON LEFT VENTRICULAR SYSTOLIC FUNCTION IN CHRONIC HEART FAILURE ASSESSED BY 99MTC-SESTAMIBI GATED MYOCARDIAL SCINTIGRAPHY
Percutaneous Transluminal Angioscopy During Coronary Intervention
To investigate the feasibility of angioscopic-guided percutaneous
transluminal coronary angioplasty and to elucidate the mechanism
of efficacy of coronary stenting for acute myocardial infarction,
we performed coronary angioscopy in 102 patients with stable
angina or acute myocardial infarction. Thrombi and intimal flaps
were observed in most patients after coronary angioplasty. Large
intimal splits were seen in one third of patients. Stents were
inserted in 10 patients who were revealed to have a large flap or
protruding split to the inner lumen. Thrombolytic agents were
administered in 2 patients with large thrombi. Additional
treatments were required in 32% of patients. No acute
myocardial infarction or unstable angina occurred in patients
during hospitalization. Thus, angioscopy of the coronary lumen
enables clinicians to determine the most appropriate and least
risky coronary intervention strategy. In patients with acute
myocardial infarction, angioscopy revealed occlusive or protruding
thrombi in 34 of 35 patients. The protruding thrombi disappeared
after stenting. The frequency of large intimal flaps increased
after predilatation with balloon, but these disappeared after
stenting. The present angioscopic study demonstrates that the
coronary stent compresses the occlusive or protruding thrombi and
covers the ruptured thrombogenic plaque Consequently,
smooth-surfaced and wide vessel lumen are obtained
Histopathological and clinical characteristics of duodenal gastrointestinal stromal tumors as predictors of malignancy
Coronary Angioscopic Evaluation for Serial Changes of Luminal Appearance After Pharmacological and Catheter Interventions
Methodological Considerations for Utilizing Plasma Matrix Metalloproteinase-9 as a Biomarker in Acute Vascular Syndromes
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