Silva Am
University of Chile
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Publication
Featured researches published by Silva Am.
Revista Medica De Chile | 2010
Héctor Ugalde; Alfredo Ramírez; Diego Ugalde; Eric Farías; Silva Am
Background: Between 0.3 and 1.3% of coronary arteries, have anomalous origins. Circumflex artery has the higher frequency of anomalies. Aim: To study the frequency of congenital anomalous origins of coronary arteries among adult patients subjected to a coronary angiography. Material and Methods: Analysis of reports of 10,000 coronary angiographies performed in a clinical hospital. Patients with congenital heart disease were excluded. Results: One hundred twenty nine patients (1.3%), aged 59 ± 12years (70% males) had congenital anomalies in the origin of coronary arteries. The most common anomaly was the origin of right coronary artery from the left coronary sinus in 75%, followed from the origin of circumflex artery from the right side in 20%o. No association between origin anomalies and atherosclerosis or aortic valve disease, was observed. Conclusions: In this series of patients, origin anomalies of coronary arteries were not associated with aortic valve disease or atherosclerosis, differing from other published reports. Right coronary artery had the highest frequency of anomalies.
Revista Medica De Chile | 2007
Héctor Ugalde; Alfredo Ramírez; Gastón Dussaillant; Ayala F; Sebastián García; Silva Am; Eric Farías
Background: There are guidelines about equipment, premises, personnel, indications and complications rates for coronary angiography, that every center performing this procedure should adhere. Aim: To report the experience with 5.000 coronary angiographies and to assess the compliance of the center with the current guidelines. Material and methods: Prospective registry of 5.000 patients aged 60±11 years (3.475 males) subjected to coronary angiography since 1992, assessing all aspects of the procedure with special emphasis on complications. Results: The indications for 80% of procedures was suspected coronary atherosclerosis. The main risk factors were hypertension and smoking. Coronary atherosclerosis was demonstrated in 62%, mainly one vessel disease. These were two deaths due to the procedure (0.04%), three patients (0.06%) had an acute myocardial infarction or a stroke. These figures are lower than referential values. Conclusions: In this center, coronary angiography is a safe procedure, with complications rates that are even lower than referential values
Revista Medica De Chile | 1998
Gastón Dussaillant; Ayala F; Alfredo Ramírez; Héctor Ugalde; Silva Am; Eric Farías; Oyonarte M
Revista Medica De Chile | 1998
Alfredo Ramírez; Quispe P; Silva Am; Eric Farías
Revista Medica De Chile | 1992
Chamorro H; Barquín I; Gómez P; Ayala F; Alfredo Ramírez; Silva Am; Quispe P
Cardiology Clinics | 2003
Reinaldo Venegas; Gastón Dussaillant; Miguel Angel Cumsille; Alfredo Ramírez; Héctor Ugalde; Sebastián García; Sonia Callejas; Eric Farías; Silva Am; Mario Ibarra
Revista Medica De Chile | 1999
Héctor Ugalde; Alfredo Ramírez; Benavente D; Antúnez M; Sebastián García; Gastón Dussaillant; Ayala F; Silva Am; Eric Farías; Villegas R
Revista Medica De Chile | 1993
Alfredo Ramírez; Héctor Ugalde; Ayala F; Yovanovic J; Chamorro H; Silva Am; Quispe P
Revista Medica De Chile | 1991
Alfredo Ramírez; Araya Mv; Aramburu I; Ayala F; Chamorro H; Silva Am
Revista Medica De Chile | 1991
Alfredo Ramírez N; María Virginia Araya A.; Ivone Aramburu M.; Francisco Ayala R.; Hernán Chamorro B.; Silva Am