Aortic pulse pressure and aortic pulsatility in patients with coronary slow flow

Objective: Coronary slow flow (CSF) is an angiographic phenomenon characterized by delayed opacification of coronary arteries in the absence of obstructive coronary disease. Recently, increased aortic pulse pressure (PP) and aortic pulsatility were both linked to the presence of angiographic coronary artery disease. In this study aortic PP and aortic pulsatility, derived from the invasively measured ascending aortic pressure waveform, were analyzed in patients with CSF and otherwise normal epicardial coronary arteries and compared with those with completely normal coronary arteries. Methods: Fifty consecutive patients with CSF (35 men, mean age: 51.7 +/- 10 years) and fifty age and gender- matched controls (34 men, 51.1 +/- 9 years) were included in the study. For determination of coronary flow, the thrombosis in myocardial infarction (TIMI) frame count method was used. Blood pressure waveforms of the ascending aorta were measured during cardiac catheterization with a fluid-filled system. Aortic pulsatility was estimated as the ratio of aortic PP to mean pressure. Results: Study groups were well matched with respect to age, gender and atherosclerotic risk factors. Although systolic, diastolic and mean pressures of the ascending aorta were similar, aortic PP (60.5 +/- 19 vs. 51.7 +/- 14 mm Hg, p = 0.01) and aortic pulsatility (0.63 +/- 0.1 vs. 0.54 +/- 0.1, p = 0.006) were significantly higher in patients with CSF compared with the controls. Besides, in all subjects, corrected TIMI frame counts of all three coronary arteries correlated with both ascending aorta PP and aortic pulsatility values. No association was found between corrected TIMI frame counts of coronary arteries and aortic mean blood pressure or brachial blood pressure parameters. Conclusion: Our findings suggest that CSF is, as with obstructive coronary artery disease, associated with more diffuse vascular disease rather than being an isolated finding

Late saphenous vein graft occlusion in patients with coronary bypass: possible role of aspirin resistance

Background: Late venous graft thrombosis, leading to recurrent ischemia, is frequently encountered in old, degenerated vein grafts with advanced atherosclerotic plaque formation. Aspirin has been indicated to maintain venous graft patency in the post-operative period. However, there is considerable evidence that aspirin resistance is of concern in patients with venous grafts. Material and Method: Prospectively enrolled 14 patients (11 male, 3 female, Group 1), who were shown to have at least one occluded saphenous vein graft on their late control coronary angiogram after bypass operation, were compared for the presence of aspirin resistance by PFA-100 with age- and sex-matched 14 patients (10 mate, 4 female, Group 2), who were found patent and well-functioning vein grafts without wall irregularities on late post-operative coronary angiograms (mean 6.5 +/- 2.5 years), enrolled as a control group. Results: Mean CT of collagen/epinephrine cartridge in Group 1 was 197 +/- 85 s and significantly Less than in Group 2 (279 44 s; p = 0.011). It was found that 50% of patients in Group 1 were so-called aspirin resistant, whereas in Group 2, this ratio was 7.1% (p=0.033). BMI (p=0.038, Beta=-0.322), uric acid level (p=0.023, Beta=-0.355), and CT by collagen/epinephrine cartridge (p=0.008, Beta=0.431) were independently predicting late occlusion of saphenous vein graft. Conclusion: Aspirin resistance is highly prevalent in patients with occluded venous grafts at a relatively late period. (C) 2004 Elsevier Ltd. All rights reserved

Fate of internal mammary artery grafted to left anterior artery is influenced by native vessel stenosis: role of competitive flow

In this paper, we give a simple counter example to the famous Hodgeconjecture

Lipid profile of patients with aortic stenosis might be predictive of rate of progression

Background Aortic stenosis is one of the most commonly encountered valvular pathology requiring surgery in developed countries. There are similarities between risk factors for coronary atherosclerosis and the development of aortic stenosis. We designed a retrospective study, evaluated the lipid profile and previous echocardiographic recordings of patients with aortic stenosis, and searched the association of rate of progression and lipid profile

Prescription in patients with systolic heart failure: glance to beta blockers

The contents of this paper has been incorporated into math.CO/0308288

Prescription patterns in patients with systolic heart failure at hospital discharge: why beta blockers are underprescribed or prescribed at low dose in real life?

Systolic heart failure (SHF) is associated with increased morbidity and mortality. Beta-blockers (BB) were shown to provide mortality benefit in patients with SHF, and currently indicated in all stages of patients with SHF. We evaluated the factors influencing the prescription of BBs at discharge in patients hospitalised with HF. Hospital discharge records of consecutive 1418 patients (996 men, 422 women) with a mean age of 57 +/- 15 years, hospitalised and treated for SHF (EF < 45%), were retrospectively reviewed. Mean age of female (n = 422) and male patients (n = 996) was similar (58 +/- 15 years vs. 58 +/- 14 years, p = 0.654). Mean EF was 33 +/- 7%, and not different for each sex (p = 0.288). BBs were present in 47.4% of patients at hospital discharge, and female patients were more frequently prescribed than men (51.7% vs. 45.7%, p = 0.036). Patients who were prescribed BBs at discharge were younger than those who were not (p = 0.034). Patients who were prescribed BBs at discharge had significantly higher EF than those who were not (p = 0.019). Older patients were prescribed low-dose BBs. Besides, creatinine level was significantly higher in the group who were prescribed low-dose BBs than those who were prescribed high dose. However, EF was significantly lower in the group, who were prescribed low-dose BBs than in those prescribed moderate-high dose (33 +/- 7% vs. 35 +/- 7%, p = 0.023). There exist several factors associated with underuse of this highly recommended medication in patients with HF

Relation of coronary collateral vessel development in patients with a totally occluded right coronary artery to the metabolic syndrome

Development of coronary collaterals (CCs) is triggered by the gradient between arteries due to obstruction and myocardial ischemia. Presence of CCs that feed the jeopardized myocardial area may limit the infarct size after coronary occlusion and may even provide a survival benefit. However, some patients develop good CCs, whereas others do not. The metabolic syndrome (MS) has been identified as a secondary target to decrease cardiovascular risk, although the effect of MS on development of CCs has not been investigated. We prospectively enrolled 596 consecutive patients (337 men and 259 women; mean age 56 +/- 8 years) who underwent coronary angiography at our center and were found to have total occlusion of the right coronary artery. Patients were then classified as having good CCs (Rentrop's grades 2 to 3) or poor CCs (Rentrop's grades 0 to 1). There were significant differences in terms of body mass index (kilograms of body weight divided by square meters of height), glucose levels, triglyceride levels, and years with angina pectoris between those with good and poor CCs. Prevalences of diabetes mellitus were 27.1% among patients with good CCs and 44% among those with poor CCs (p <0.001). Presence of MS was significantly higher in patients with poor CCs than in those with good CCs (78.4% vs 49.2%, p <0.001). In regression analysis, duration of angina pectoris (beta = 0.347, 95% confidence interval [CI] 0.266 to 0.453, p <0.001), presence of diabetes mellitus (beta = 1.829, 95% CI 1.021 to 3.279, p = 0.042), wall score (beta = 2.379, 95% CI 1.356 to 4.173, p = 0.003), and presence of MS (beta = 2.993, 95% CI 1.541 to 5.813, p = 0.001) were independent predictors of angiographically determined poor CCs. In conclusion, MS seems to be independently associated with poor CCs in patients with an occluded right coronary artery. (C) 2006 Elsevier Inc. All rights reserved

Metabolic syndrome is associated with extension of coronary artery disease in patients with non-ST segment elevation acute coronary syndromes

Background Metabolic syndrome (MS) comprises a group of factors that are associated with increased risk for cardiovascular events. Acute coronary syndromes account for the most important part of cardiovascular events with considerable morbidity and mortality. We aimed to investigate the association of MS with extension of coronary artery disease in patients presenting with non-ST segment elevation (NSTE) acute coronary syndromes (ACS)