Among 112 patients after myocardial infarction (MI), males account for 94.6% with mean age is 66.47.4 years old. Most of them have complicated ventricular arrhythmia. The grade IV and V of ventricular arrhythmia on Lown classification relate strongly to the increase in left ventricular diameter, volume, weight and muscular mass and to the decrease in left ventricular systolic function. Increasing in left ventricular size (Dd 52mm, Ds 35mm, EDV 125ml, ESV 50ml), left ventricular hypertrophy (LVMI = 130g/m2), decreasing in blood ejective fraction (EF=40%) and ventricular wall distension all increase the risk of complicated and ventricular arrhythmia and grade III, IV and V of this condition according to Lown classification
Myocardial Infarction ; Arrhythmia ; ultrasonography

The research was carried out on 140 patients with previous myocardial infarction and history of typical myocardial infarction, currently with the signs of the previous myocardial infarction by electrocardiogram and the group control of 55 healthy people. Results: the heart beat in the group control and group patient were 73,2+/- 11 and 74,6 +/- 12,7 respectively; the systolic blood pressure in the group control and patients were 77,9+/- 6,4 and 77,8+/- 8,6; respectively. The left ventricular internal dimension and diastole in patients was 61,2+/- 5,6 (mm), the left ventricular length diastolic was 87,9+/-11,3 (mm); the left ventricular area diastole was 44,7+/-10.99 (cm3); the end diastolic volume was 197,1+/- 74,8 (ml). The extend of the left ventricular expansion was direct provisional with the cardiac failure grade and position of the deep septal myocardial infarction.
Myocardial Infarction ; Ultrasonography

We report here on one patient who suffered from acute myocardial infarction that was due to late stent thrombosis, and this was associated with late stent malapposition very late (21 months) after the deployment of a paclitaxel-eluting stent and shortly after (7 days) the discontinuation of the aspirin therapy. The intravascular ultrasound examination revealed that the late stent thrombosis was accompanied by late stent malapposition. This is a report on late stent thrombosis associated with late stent malapposition after the successful implantation of a paclitaxel-eluting stent (PES).
Aspirin ; Humans ; Myocardial Infarction ; Stents* ; Thrombosis* ; Ultrasonography

An intramural hematoma is a rare, challenging cause of myocardial infarction generally seen in middle-aged females with no atherosclerotic risk factors. Intravascular ultrasound is useful in diagnosing and managing intramural hematomas. Here, we present anintramural hematoma presenting with ST-elevation myocardial infarction without definite intimal dissection in an elderly man who was diagnosed using intravascular ultrasound and managed accordingly.
Aged* ; Female ; Hematoma* ; Humans ; Myocardial Infarction* ; Risk Factors ; Ultrasonography

In order to evaluate the left ventricular remodeling in patients with myocardial infarction after revascularization with intravenous real-time myocardial contrast echocardiography (RT-MCE), intravenous RT-MCE was performed on 20 patients with myocardial infarction before coronary revascularization. Follow-up echocardiography was performed 3 months after coronary revascularization. Segmental wall motion was assessed using 18-segment LV model and classified as normal, hypokinesis, akinesis and dyskinesis. Myocardial perfusion was assessed by visual interpretation and divided into 3 conditions: homogeneous opacification=1; partial or reduced opaciflcation or subendocardial contrast defect=2; constrast defect=3. Myocardial perfusion score index (MPSI) was calculated by dividing the total sum of contrast score by the total number of segments with abnormal wall motion. Twenty patients were classified into 2 groups according to the MPSI: MPSImyocardial perfusion, MPSI>1.5 as poor myocardial perfusion. To assess the left ventricular remodeling, the following comparisons were carried out: (1) Comparisons of left ventricular ejection fraction (LVEF), left ventricular end-systolic volume (LVESV) and left ventricular end-diastolic volume (LVEDV) before and 3 months after revascularization in two groups; (2) Comparisons of LVEF, LVESV and LVEDV pre-revascularization between two groups and comparisons of these 3 months post-revascularization between two groups; (3) Comparisons of the differences in LVEF, LVESV and LVEDV between 3 months post-and pre-revascularization (DeltaLVEF, DeltaLVESV and DeltaLVEDV) between two groups; (4) The linear regression analysis between DeltaLVEF, DeltaLVESV, DeltaLVEDV and MPSI. The results showed that the LVEF obtained 3 months after revascularization in patients with MPSI>1.5 was obviously lower than that in those with MPSI1.5 was obviously larger than that in those with MPSI1.5 and those with MPSImyocardial infarction after revascularization.
Echocardiography/*methods ; Infusions, Intravenous ; Myocardial Infarction/*diagnosis ; Myocardial Infarction/pathology ; Myocardial Infarction/*ultrasonography ; Myocardial Reperfusion ; Myocardium/*pathology ; Perfusion ; Regression Analysis ; Time Factors ; Ventricular Remodeling

The anomalous origin of the right coronary artery is a rare condition, but it has clinical importance because there have been reports of nonfatal or fatal myocardial infarction and sudden death associated with exercise for patients with this anatomy. We describe here a patient for whom 64 channel multi-detector row computed tomography was useful to identify this anomaly, and intravascular ultrasound was used to evaluate the myocardial ischemia by visualizing the coronary lumen.
Coronary Vessels ; Death, Sudden ; Humans ; Myocardial Infarction ; Myocardial Ischemia ; Ultrasonography, Interventional

The effects of cardiomyocyte grafting on left ventricular (LV) remodeling and function in rats with chronic myocardial infarction were evaluated using high-frequency ultrasound. Chronic myocardial infarction was induced in 50 Wister rats by ligating the left anterior descending artery. They were randomized into two groups: a trial group that received neonatal rat cardiomyocyte transplantation (n=25) and a control group which were given intramyocardial injection of culture medium (n=25). The left ventricular (LV) geometry and function were evaluated by high-frequency ultrasound before and 4 weeks after the cell transplantation. After the final evaluation, all rats were sacrificed for histological study. The results showed that 4 weeks after the cell transplantation, as compared with the control group, the LV end-systolic dimension, end-diastolic dimension, end-systolic volume and end-diastolic volume were significantly decreased and the LV anterior wall end-diastolic thickness, LV ejection fraction and fractional shortening were significantly increased in the trial group (P<0.01). Histological study showed that transplanted neonatal rat cardiomyocytes were found in all host hearts and identified by Brdu staining. It was suggested that transplantation of neonatal rat cardiomyocytes can reverse cardiac remodeling and improve heart function in chronic myocardial infarction rats. High-frequency ultrasound can be used as a reliable technique for the non-invasive evaluation of the effect of cardiomyocyte transplantation.
Animals, Newborn ; Echocardiography/*methods ; Myocardial Infarction/physiopathology ; Myocardial Infarction/*therapy ; Myocardial Infarction/ultrasonography ; Myocytes, Cardiac/*transplantation ; Random Allocation ; Rats, Wistar ; Ventricular Function, Left/*physiology ; Ventricular Remodeling

Transesophageal echocardiography was performed to evaluate the exact cause of severe mitral regurgitation in a 64-year-old man presented with hypotension and dyspnea after acute inferior wall myocardial infarction. In mid-esophageal two-and four-chamber view, the ruptured stump of papillary muscle could not be visualized. However, in transgastric two-chamber view, we could clearly visualize the ruptured head of the posteromedial papillary muscle as a separated mass attached by chorda tendinae, as well as the freely mobile stump of the ruptured papillary muscle within the left ventricle. So, the comprehensive transesophageal echocardiography, including transgastric imaging, is always indicated in patients with severe mitral regurgitation after acute myocardial infarction.
*Echocardiography, Transesophageal ; Heart Rupture, Post-Infarction/*ultrasonography ; Human ; Male ; Middle Aged ; Myocardial Infarction/complications/*ultrasonography ; Papillary Muscles/*ultrastructure

The myocardial viability after myocardial infarction was evaluated by intravenous myocardial contrast echocardiography. Intravenous real-time myocardial contrast echocardiography was performed on 18 patients with myocardial infarction before coronary revascularization. Follow-up echocardiography was performed 3 months after coronary revascularization. Segmental wall motion was assessed using 18-segment LV model and classified as normal, hypokinesis, akinesis and dyskinesis. Viable myocardium was defined by evident improvement of segmental wall motion 3 months after coronary revascularization. Myocardial perfusion was assessed by visual interpretation and divided into 3 conditions: homogeneous opacification; partial or reduced opaciflcation or subendocardial contrast defect; contrast defect. The former two conditions were used as the standard to define the viable myocardium. The results showed that 109 abnormal wall motion segments were detected among 18 patients with myocardial infarction, including 47 segments of hypokinesis, 56 segments of akinesis and 6 segments of dyskinesis. The wall motion of 2 segments with hypokinesis before coronary revascularization which showed homogeneous opacification, 14 of 24 segments with hypokinese and 20 of 24 segments with akinese before coronary revascularization which showed partial or reduced opaciflcation or subendocardial contrast defect was improved 3 months after coronary revascularization. In our study, the sensitivity and specificity of evaluation of myocardial viability after myocardial infarction by intravenous real-time myocardial contrast echocardiography were 94.7% and 78.9%, respectively. It was concluded that intravenous real-time myocardial contrast echocardiography could accurately evaluate myocardial viability after myocardial infarction.
Angioplasty, Transluminal, Percutaneous Coronary ; Cell Survival ; Coronary Artery Bypass ; Echocardiography/*methods ; Models, Statistical ; Myocardial Infarction/*pathology ; Myocardial Infarction/*ultrasonography ; Myocardial Revascularization ; Myocardium/*pathology ; Perfusion ; Time Factors

BACKGROUND AND OBJECTIVES: Intracoronary Stenting has been established as an effective treatment modality for the reduction of restenosis in patients with acute myocardial infarction. This study was performed in order to evaluate the long-term outcomes of stenting for infarct-related artery (IRA) lesions using intravascular ultrasound (IVUS) and compare these results with the stenting of non infarct-related artery (non-IRA) lesions. SUBJECTS AND METHODS: IVUS-guided coronary stenting was successfully performed in 510 native coronary lesions (105 IRA vs. 405 non-IRA). A six-month angiography was performed in 419 lesions (82.2%):87 IRA lesions (82.9%) and 332 non-IRA lesions (82.0%). The results were evaluated using clinical, angiographic and IVUS methods. RESULTS: There were no significant differences in the clinical and angiographic variables between the two groups. IVUS variables including reference vessel area and minimal stent area were also similar between the two groups. There was no significant difference in the angiographic restenosis rate between the two groups in cases of minimal stent area Angiography ; Arteries* ; Coronary Restenosis ; Follow-Up Studies* ; Humans ; Myocardial Infarction ; Stents* ; Ultrasonography*