Resumen

GINZO CANETE, Alejandro Daniel. Prolonged QTc interval in adult patients. Rev. Virtual Soc. Parag. Med. Int. [online]. 2015, vol.2, n.2, pp.9-22. ISSN 2312-3893.  https://doi.org/10.18004/rvspmi/2312-3893/2015.02(02)09-022.

Introduction: The prolonged QTc interval has been identified as a risk factor for ventricular arrhythmias and even sudden death. Objective: To establish the prevalence of prolonged QTc in hospitalized patients. Methodology: Prospective descriptive observational study that included 123 patients hospitalized in the Service of Medical Clinic and urgency rooms of the National Hospital in 2014. A value > 0.44 seg in men and >0.46 seg in women for 4 derivations: aVL, DII, V5 and V6Se were considered as prolonged QTc. Results: The prevalence of QTc was 26% with a predominance of men (71%). The main associated comorbidity was diabetes mellitus. K+, Ca⁺² and Mg+ electrolytes were low in most patients. A 16% of the patients with prolonged QTc died. Conclusions: A high prevalence (26%) of prolonged Qtc was found. More complex studies are required to determine the association of this pathology with the comorbidities, neurological symptoms, use of medicines and alteration of electrolytes detected.

Palabras clave : prolonged QTc; electrocardiogram; sudden death; torsades de pointes.

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