Exercise and redistribution myocardial scintigraphy using thallium-201 was compared with the left ventricular angiogram and with the presence of stenosis or occlusion of coronary arteries on angiography. Irreversible scintigraphic defects representing areas of myocardial infarction were found in all patients with occlusion of the left anterior descending artery but nearly one-third of patients ...

OBJECTIVE The clinical significance of an intramural course (or bridging) of the coronary artery remains controversial. We investigated the relationship between intramural coronary arteries (ICAs) and coronary stenosis and prognosis of subjects with ICA. METHODS AND RESULTS ICA and coronary stenosis were assessed by multidetector computed tomography coronary angiography. ICAs in the left ante...

We report a 23-year-old man who underwent coronary artery bypass grafting (CABG) for coronary aneurysms associated with Kawasaki disease using the left internal thoracic artery (LITA) and right gastroepiploic artery (RGEA) after a second myocardial infarction (MI). Preoperatively, this patient showed repetitive occlusion and recanalization of coronary artery flow without coronary stenosis. Indi...

BACKGROUND Breathing maneuvers can elicit a similar vascular response as vasodilatory agents like adenosine; yet, their potential diagnostic utility in the presence of coronary artery stenosis is unknown. The objective of the study is to investigate if breathing maneuvers can non-invasively detect inducible ischemia in an experimental animal model when the myocardium is imaged with oxygenation-...

We report a case of a patient in whom collateral flow originating from the left anterior descending coronary artery was initially associated with a right coronary artery stenosis; seven months after successful angioplasty of the right coronary artery lesion, a severe left anterior descending stenosis developed and induced reversed collateral flow from the right coronary artery through the same ...

Multivessel or multisegment spasm in patients with known widespread coronary atherosclerotic disease is an infrequent occurrence. We describe a prolonged spasm of both the left main and the left anterior descending artery in a patient with chronic effort angina and multivessel coronary artery disease, who previously underwent percutaneous coronary intervention and drug eluting stents implantati...

SUMMARY Dipyridamolc-Thallium imaging is a relatively safe and accurate method to evaluate myocardial perfusion in patients who arc unable to exercise to a maximal exertion (5,6,8,9). A 51year-old woman was admitted to Taleghani hospital with clinical symptoms and signs of coronary artery disease. Intravenous dipyridamote-Thallium scan was performed in this case. In multiple views obtained f...

A 40-year-old man was admitted to our hospital for chest pain after smoking. Coronary computed tomography angiography showed severe stenosis in the left anterior descending artery. The stenosis site had no plaque on stretched curved multiplanar reconstruction and short-axis images. Coronary angiography revealed improvement of the severe stenosis after the intracoronary administration of isosorb...

To study the relationship between the quantitatively assessed coronary artery dimensions and the regional coronary flow reserve as measured by digital subtraction cineangiography, we investigated 17 coronary arteries with a single discrete proximal stenosis and 12 normal coronary arteries before and after intracoronary administration of papaverine. Coronary flow reserve was found to be curvilin...

Chest pain is a typical symptomof ischemic coronary artery diseases. Patients with ischemic coronary artery diseases typically have coronary artery stenosis, although approximately 10–20% of patients with angina pectoris have normal coronary artery, and most of these patients are syndrome X that showed slow coronary flow [1,2]. In addition, patients with chest pain butwith an intact coronary ar...