Resumen

AYMAYA GUTIERREZ, César Eloy; CARPIO DEHEZA, Gonzalo; VASQUEZ RIOS, Juan Carlos  y  DIEZ CANSECO, Ruiz Luis. Evaluation of an alternative test for the diagnosis of atrial growth based on the morphology of the waves f in the atrial fibrillation. Gac Med Bol [online]. 2010, vol.33, n.2, pp.11-15. ISSN 1012-2966.

The atrial fibrillation (FA), a frequent arrhythmia, the ECG replaces the waves p with waves f, some of them, these last ones associate to atrial growth (factor predictive in the handling of AF); The Clinical Hospital Viedma (CHV), departmental center of reference, it doesn't have echo-cardiograph in emergencies, is necessary a new alternative diagnosis method for the atrial growth in unstable patient; We propose a diagnosis test: "atrial growth (>40mm) >>Wave thick f (>0,1mV)". Our descriptive-analytic and traversal study, taking of the universe, patients assisted by the cardiology service in the HCV of Cochabamba-Bolivia from 2005 to 2009 (4700-patient), a sample of 1000 patients, a simple aleatory way, we work with 150 patients (representative). Results: rate of prevalence of AF, 15%(IC95%:13;17); Masculine predominant sex, 54,7%(RR=1(X2=0 and value of p >0,05-no significant)); Age with 17-81 year-old range, mediana=53 anos(CI95%:50;56) and journey intercuartil (IQR)=21 years; Classifying was thick wave f in 65%(CI95%:57;73) and atrial left growth in 88%(IC95%:83;93); The correlation atrial growth>>Wave thick f", we obtained a OR=1,5; or 0,5 times more possibility to present wave thick f in atrial growth. We find Chagas myocardiophaty and pathologies rheumatic associates, both 65%; Internal validity of the test: S=66%; E=44%; PPV=90% and PNV=15%, the capacity to determine atrial growth with the positive test (S) it is acceptable, but the probability of having positive test in atrial growth (PPV) it is very high; External validity: Index kappa = moderated 0,6-Reproductibilidad inter-observer, compared with the echo-cardiography. Bigger application was obtained in Chagas myocardiopathy (S=70%, E=57%, PPV=94%).

Palabras clave : Test; f Wave; Fibrillation; Atrial growth.

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