Prevención secundaria post infarto agudo de miocardio en hospitales públicos: implementación y resultados de las garantías GES / Universal health coverage and accomplishment of secondary prevention goals among patients with acute myocardial infarction

Background: In 2005, acute myocardial infarction (AMI) was included in a universal health plan (GES) to reduce inequity in care and optimize its diagnosis and treatment. Aim: To evaluate the effect of GES in risk factor control and therapeutic management among patients with AMI. Material and Methods: A survey was conducted in 2008-2009 in six public hospitals. Patients were identified from a hospital based registry of AMI and evaluated one year later with laboratory tests and an interview. Results: The registry enrolled 534 patients with ST and non ST segment elevation myocardial infarction. Of these, 416 patients aged 63 ± 12 years (25% women) were evaluated one year later. Eighty three percent were evaluated by a cardiologist and 37% by a general practitioner. Twenty two percent were evaluated by a nurse and 22% by a nutritionist. At the moment of the interview, 9% smoked, 78% were overweight or obese, 24% performed moderate or vigorous physical activity ≥ 150 min/week, 60% had systolic pressure > 130 mmHg and 63% a diastolic pressure > 80 mmHg. In 30%, LDL cholesterol was > 100 mg/dl and in 43%, triglycerides were > 150 mm/dl. Twenty two percent were diabetic and among them, 52% had a glycosilated hemoglobin > 7%. Forty five percent of non-diabetic patients had a fasting glucose > 100 mg/dl. Ninety three percent were in treatment with aspirin, 86% with statins, 66% with b-blockers, and 73% with angiotensin converting enzyme inhibitors or angiotensin receptor blockers and 20% with clopidogrel. Conclusions: Despite the high proportion of patients in treatment with evidence-based therapy, many do not achieve the targets for risk factor control with the new health care model.

Implicancias de la glicemia de ingreso en la mortalidad intrahospitalaria y alejada según el método de reperfusión en pacientes con infarto agudo del miocardio y supradesnivel del segmento ST / Admission hyperglycemia and mortality of ST segment elevation myocardial infarction

Background: Hyperglycemia at admission has been associated to an adverse prognosis in patients with ST-segment elevation acute myocardial infarction (STE-MI). However, its impact over the results of reperfusion therapies in patients with STEMI is still a matter of controversy. Aim: To determine the impact of admission hyperglycemia on hospital and long term mortality, according to the method of reper-fusion utilized in patients with STEMI. Material and Methods: Prospective registry of 1,634 consecutive patients aged 60 ± 12 years (77 percent male), from 3 participating hospitals in the Chilean Registry of Myocardial Infarction (GEMI). We evaluated demographic, clinical and laboratory variables, reperfusion method used, hospital and long term mortality. The impact of hyperglycemia on hospital and long term mortality was evaluated by a logistic regression analysis and Cox risk, respectively, adjusted by Thrombolysis in Myocardial Infarction (TIMI) risk score. Results: Twenty four percent of patients were diabetics and in 45 percent, the infarct was located on the anterior wall. The mean TIMI risk score was 3.2 ± 2.4. Hyperglycemia at entry was associated to a greater hospital and long term mortality, independently of the reperfusion strategy utilized. Primary angioplasty was associated to a greater benefit, compared to thrombolysis among hyperglycemic patients with an odds ratio: 2.9, 95 percent confi dence intervals: 1.0-8.0 and a hazard ratio of 2.9, 95 percent confi dence intervals: 1.44-5.88, independently of a previous history of diabetes mellitus and TIMI risk score. Conclusions: In patients with STEMI, admission hyperglycemia is associated with a worse prognosis which was significantly improved with primary angioplasty compared to thrombolysis, independently of the admission TIMI risk score.

Impacto de la trombolisis y de la angioplastia primaria en pacientes con infarto agudo del miocardio tratados en centros hospitalarios terciarios / Mortality of patients with ST-elevation acute myocardial infarction treated with primary angioplasty or thrombolysis

Background: Primary angioplasty is the most effective treatment of ST-segment elevation acute myocardial infarction (STEMI). However, its worldwide implementation is difficult to obtain. Therefore thrombolysis continues to be the treatment most commonly used. Aim: To evaluate inhospital and long term mortality of patients with STEMI treated with thrombolysis or angioplasty, in three hospitals participating in the Chilean National Registry of Acute MI (GEMIgroup). Material and tnethods: Registry of 1,634 consecutive patients with STEMI admited between 2002 and 2006. Risk was stratified using the Thrombolysis in Myocardial Infarction (TIMI) Risk Score. Hospital and log term mortalities were adjusted using logistic and Cox regression models. Results: Fifty nine percent of patients (967 patients aged 60±12 years, 77 percent males) were subjected to reperfusion therapies, 28 percent with primary angioplasty and 72 percent with thrombolysis. Hospital mortality rates among patients treated with thrombolysis and angioplasty were 10.9 percent and 5.6 percent (p =0.01), respectively The figures for long term mortality were 20.4 percent and 9.7 percent, respectively (p <0.01). Multivariate analysis confirmed the lower mortality among subjects treated with angioplasty, with an odds ratio (OR) in favor of angioplasty of 8.5 (95 percent confidence intervals (CI) 3-35) for in hospital mortality and of 4.7 (95 percent CI 2.6-8.3) for long term mortality. The higher benefits of angioplasty were observed in males, in the elderly and in patients with a TIMI score over >3. Conclusions: Hospital and long term mortality of patients with STEMI was lower among those treated with primary angioplasty. This treatment is most beneficial among males, in the elderly and in patients with a TIMI score >3.