Invasive Coronary Angiography (invasive + coronary_angiography)

Distribution by Scientific Domains

Selected Abstracts

Apical Ballooning Syndrome in a Postoperative Patient with Normal Microvascular Perfusion by Myocardial Contrast Echocardiography

Gautam Ramakrishna M.D.
Apical ballooning syndrome is classically described as transient left ventricular (LV) dysfunction, marked LV akinesia, and normal or near-normal coronary arteries. The etiology is unclear and there is limited information based on case reports and small case series. We describe a 35-year-old woman who underwent surgical hepatectomy and developed apical ballooning syndrome in the postoperative period. The novel use of myocardial contrast echocardiography (MCE) in this setting demonstrated intact microvascular perfusion and lack of coronary flow-limiting abnormalities despite apical akinesis. In select patients with similar clinical presentations, performing MCE is safe and may be pursued as an alternative to invasive coronary angiography. [source]

Comparison of dual to single contrast bolus magnetic resonance myocardial perfusion imaging for detection of significant coronary artery disease

Jan G.J. Groothuis MD
Abstract Purpose: To investigate the incremental diagnostic value of dual-bolus over single-contrast-bolus first pass magnetic resonance myocardial perfusion imaging (MR-MPI) for detection of significant coronary artery disease (CAD). Materials and Methods: Patients (n = 49) with suspected CAD underwent first pass adenosine stress and rest MR-MPI and invasive coronary angiography (CA). Gadolinium diethylenetriamine pentaacetic acid (Gd-DTPA) was injected with a prebolus (1 mL) and a large bolus (0.1 mmol/kg). For the single-bolus technique, the arterial input function (AIF) was obtained from the large-contrast bolus. For the dual-bolus technique, the AIF was reconstructed from the prebolus. Absolute myocardial perfusion was calculated by Fermi-model constrained deconvolution. Receiver operating characteristic (ROC) analysis was used to investigate diagnostic accuracy of MR myocardial perfusion imaging for detection of significant CAD on CA at vessel-based analysis. Results: The area under the curve (AUC) of the minimal stress perfusion value for the detection of significant CAD using the single-bolus and dual-bolus technique was 0.85 0.04 (95% confidence interval [CI], 0.77,0.93) and 0.77 0.05 (95% CI, 0.67,0.86), respectively. Conclusion: In this study the dual-bolus technique had no incremental diagnostic value over single-bolus technique for detection of significant CAD with the used contrast concentrations. J. Magn. Reson. Imaging 2010;32:88,93. 2010 Wiley-Liss, Inc. [source]

Dobutamine Stress Cardiac Magnetic Resonance Imaging to Detect Myocardial Ischemia in Women

Subha V. Raman MD
This study sought to evaluate dobutamine stress cardiac magnetic resonance imaging (DCMRI) in women with abnormal stress nuclear testing results. Women with findings on stress nuclear exams, including electrocardiography and/or perfusion, thought to require further evaluation with invasive coronary angiography were prospectively enrolled. Multiplane cine imaging was obtained at rest and at each stage of inotropic stress with atropine as needed to achieve target heart rate. DCMRI results were compared with stress nuclear and invasive cardiac catheterization results. Of 23 patients enrolled successfully, 22 completed DCMRI examination without complications. In all cases, DCMRI imaging demonstrated appropriate stress response with no ischemia despite abnormalities on stress nuclear testing. In the 18 patients who also underwent invasive coronary angiography, no significant obstructive disease was identified. DCMRI may be a useful alternative to stress nuclear examination in women; larger studies are warranted to determine its potential to more accurately predict obstructive coronary artery disease. [source]

Is the left anterior descending artery really absent?,A decisive input from coronary CT angiography,

Yalcin Hacioglu MD
Abstract This case report emphasizes the importance of coronary CT angiography (CTA) as a backup imaging modality in patients with suspected coronary anomalies and difficult canulation, during invasive coronary angiography by catheterization (Cath). In this patient, the numerous canulation attempts during Cath failed to identify a left anterior descending artery (LAD) leading to the diagnosis of absent LAD. CTA was done for further clarification, which easily visualized LAD originating from a separate ostium at the left sinus of Valsalva finalizing the diagnosis as absent left main artery with dual left coronary ostia. 2010 Wiley-Liss, Inc. [source]

Cardiovascular computed tomographic angiography evaluation following unsuccessful invasive angiography: The clinical utility of 3D volume rendering,

Ambarish Gopal MD
Abstract In an appropriate clinical setting, cardiac CT angiography (CCT) can be used as a safe and effective noninvasive imaging modality for defining coronary arterial anatomy by providing detailed three-dimensional anatomic information that may be difficult to obtain with invasive coronary angiography (ICA). We present a patient where coronary angiography by ICA was unsuccessful and where the subsequent CCT proved to be very useful in providing us relevant information. 2009 Wiley-Liss, Inc. [source]