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      Angiographic Characteristics of Renal Arterial Disease over the Spectrum of Coronary Artery Disease

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          Background/Aim: The angiographic characteristics of renal artery stenoses (RAS) in patients with coronary artery disease (CAD) have not been yet fully investigated. We sought to evaluate the angiographic characteristics of RAS in patients with CAD. Methods: The medical records of consecutive patients who underwentcoronary angiography in a single public institution over a 12-month period were evaluated. The patients who underwent coincident diagnostic renal angiography to evaluate renal vessels on the basis of clinical criteria and who had at least one-vessel CAD were analyzed. Moderate (50–70%) to severe (70–100%) arterial stenoses were noted as significant angiographic findings. The types of stenosis (ostial, true renal, mixed) and presence and location of calcium were recorded. Results: Angiographically significant RAS were reported in 40 (19.5%) of 205 consecutive patients (mean age 67.1 ± 12.8 years, mean serum creatinine concentration 2.1 ± 0.5 mg/dl, mean glomerular filtration rate 52 ± 13 ml/min) for a total of 55 lesions. The RAS severity was moderate in 30.9% (17/55), severe in 69.1% (38/55), ostial in 27.2% (15/55), true renal in 10.9% (6/55), and mixed in 61.8% (34/55) of the patients. The mean lesion length was 16 ± 1.8 mm. Patients with ≧3-vessel CAD had a statistically significantly higher prevalence of mixed calcified RAS (18/24, 75%). Logistic regression analyses revealed ≧3-vessel CAD (odds ratio 9.917, p = 0.002), age >65 years (odds ratio 3.817, p = 0.036), and ≧3 risk factors (odds ratio 2.8, p = 0.048) as independent predictors of RAS. Conclusion: RAS in multivessel CAD patients seems to have a peculiar angiographic pattern, such as a higher prevalence of mixed calcified lesions and poststenotic enlargement, that should be taken in account when dealing with RAS.

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          Most cited references 13

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          Prevalence of left main coronary artery disease, of three- or four-vessel coronary artery disease, and of obstructive coronary artery disease in patients with and without peripheral arterial disease undergoing coronary angiography for suspected coronary artery disease.

          Data from the present investigation showed that the prevalence of current cigarette smoking, current or ex-cigarette smoking, systemic hypertension, diabetes mellitus, and dyslipidemia was significantly higher in patients with peripheral arterial disease (PAD) than in patients without PAD. The present report also showed that compared with patients without PAD undergoing coronary angiography for suspected coronary artery disease (CAD), patients with PAD undergoing coronary angiography for suspected CAD had a higher prevalence of left main CAD (18% vs <1%), a higher prevalence of 3- or 4-vessel CAD (63% vs 11%), and a higher prevalence of obstructive CAD (98% vs 81%).
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            Outcomes of patients with chronic renal insufficiency in the bypass angioplasty revascularization investigation.

            Although severe chronic kidney disease (CKD) is an independent predictor of mortality among patients with coronary artery disease, the impact of mild CKD on morbidity and mortality has not been fully defined. Morbidity and mortality for the 3608 patients with multivessel coronary artery disease enrolled in the Bypass Angioplasty Revascularization Investigation randomized trial and registry were compared on the basis of the presence and absence of CKD, defined as a preprocedure serum creatinine level of >1.5 mg/dL. Seventy-six patients had CKD. Patients with renal insufficiency were older and more likely to have a history of diabetes, hypertension, and other comorbidities. Among patients undergoing PTCA, patients with CKD had a greater frequency of in-hospital death and cardiogenic shock (P<0.05 and 0.01, respectively). There was a trend toward a larger proportion of patients with CKD experiencing angina at 5 years (P=0.079). Patients with CKD had more cardiac admissions (P=0.003 and <0.0001 for patients undergoing PTCA and CABG, respectively) and a shorter time to subsequent CABG after initial revascularization than patients without CKD (P=0.01). CKD was associated with a higher risk of death at 7 years, both of all causes (relative risk 2.2, P<0.001) and of cardiac causes (relative risk 2.8, P<0.001). CKD is associated with an increased risk of recurrent hospitalization, subsequent CABG, and mortality. This increased risk of death is independent of and additive to the risk associated with diabetes.
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              Primary renal artery stenting: characteristics and outcomes after 363 procedures.

              Stenting improves the acute results of percutaneous balloon angioplasty for atherosclerotic renal artery stenosis. Predictors of benefit and angiographic restenosis are not well understood. We describe the technical and clinical success of renal artery stenting in a large consecutive series of patients with hypertension or renal insufficiency. We identify clinical, procedural, and anatomic factors that might influence outcome, restenosis, and survival. Primary renal artery stenting was performed in 300 consecutive patients who underwent 363 stent procedures in 358 arteries. Angiograms were analyzed quantitatively. Clinical and angiographic follow-up data are available after a median of 16.0 months. At baseline, 87% of patients had hypertension, and 37% had chronic renal insufficiency. The mean age was 70 years (interquartile range 63.1-74.6) years. The stenosis was unilateral in 49% and bilateral in 48% and involved a solitary functioning kidney in 3.6%. The stenting procedure was successful in all attempts. There were no procedural deaths or emergency renal surgical procedures. Postprocedure azotemia was seen in 45 of 363 (12%) procedures but persisted in only 6 patients (2%), all of whom had baseline renal insufficiency. Systolic and diastolic blood pressures were significantly reduced (systolic blood pressure from 164.0 +/- 28.7 to 142.4 +/- 19.1 mm Hg, P 4.5 mm (P <.01 vs caliber <4.5 mm). Neither poststenotic dilation nor severity of angiographic stenosis predicted clinical outcome. Primary renal artery stenting can be performed safely with nearly uniform technical success. The majority of patients with hypertension or renal insufficiency derive benefit. Follow-up mortality is 5-fold higher in patients with baseline renal insufficiency. Clinical and angiographic features did not predict blood pressure or renal functional outcome. Restenosis is more common in renal arteries with a reference caliber less than 4.5 mm.

                Author and article information

                Am J Nephrol
                American Journal of Nephrology
                S. Karger AG
                April 2005
                18 May 2005
                : 25
                : 2
                : 116-120
                aInterventional Cardiology Unit, Division of Cardiology, Rovigo General Hospital, Rovigo, bEndocardiovascular Therapy Research, Legnago, and cDivision of Cardiology, Department of Specialist Medicine, Legnago General Hospital, Legnago, Italy
                84854 Am J Nephrol 2005;25:116–120
                © 2005 S. Karger AG, Basel

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                Page count
                Figures: 1, Tables: 5, References: 16, Pages: 5
                Self URI (application/pdf): https://www.karger.com/Article/Pdf/84854
                Original Report: Patient-Oriented, Translational Research


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