نتایج جستجو برای: adenosine angina
تعداد نتایج: 114488 فیلتر نتایج به سال:
OBJECTIVES We conducted a pilot study for a large definitive clinical trial evaluating the impact of ranolazine in women with angina, evidence of myocardial ischemia, and no obstructive coronary artery disease (CAD). BACKGROUND Women with angina, evidence of myocardial ischemia, but no obstructive CAD frequently have microvascular coronary dysfunction. The impact of ranolazine in this patient...
When adenosine stress testing is performed, a vein is generally accessed in each arm. To determine whether the one-route infusion protocol, that is, infusion via one upper arm vein, is safe, myocardial perfusion imaging was performed during adenosine stress testing in patients with angina pectoris. Sixty-six consecutive patients (43 men, 68 +/- 11 years of age) with suspected coronary artery di...
chronic obstructive pulmonary disease (copd) has been defined by the global initiative for chronic obstructive lung disease (gold), as a disease state characterized by airflow limitation which is not fully reversible. copd consists of emphysema which is the destruction and inflammation of the lung alveoli. adenosine deaminase (ada, e.c.3.5.4.4) converts adenosine to inosine. there are two isoen...
BACKGROUND Classical anti-ischemic drugs are the first-line form of treatment in patients with microvascular angina (MVA), but they often fail to achieve a satisfactory control of angina symptoms. It is unknown whether there is any relation between improvement of angina status and changes in microvascular function induced by classical anti-ischemic drugs in MVA patients. AIM To assess whether...
OBJECTIVES The purpose of this study was to establish whether stimulation of cardiac sensory receptors in different myocardial regions results in different distributions of cardiac pain. BACKGROUND Previous studies have shown that adenosine provokes cardiac pain through stimulation of sensory receptors in the absence of myocardial ischemia. In this study adenosine was used to obtain a regiona...
BACKGROUND Patients with syndrome X (exertional angina, positive exercise test, normal coronary arteriogram) have an altered perception of cardiac pain. This symptom may arise from increased sensitivity to adenosine. Previous studies suggest that intravenous aminophylline (an adenosine receptor blocker) improves exercise tolerance in patients with this disorder. OBJECTIVE To examine the effic...
BACKGROUND We previously reported that 20% of women with chest pain but without obstructive coronary artery disease (CAD) had stress-induced reduction in myocardial phosphocreatine-adenosine triphosphate ratio by phosphorus-31 nuclear magnetic resonance spectroscopy (abnormal MRS), consistent with myocardial ischemia. The prognostic implications of these findings are unknown. METHODS AND RESU...
Among the side effects of adenosine, excitatory actions on ventricular automaticity enhanced by low concentrations of adenosine and the discharge of catecholamines are reported. The majority of adenosine-induced ventricular tachycardias (VTs) are rare, transient, not requiring further interventions and usually originate in the inferior left ventricular septum [1]. Since the coronary arteries sh...
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