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Señalar lo correcto:a. Los electrodos precordiales del ECG determinan el triángulo de Einthoven que nos permite medir el ejecardiacob. Hay cuatro electrodos periféricos que permiten medir 3 derivaciones bipolares y 4 monopolaresc. Cuando la frecuencia cardiaca está más elevada de lo normal se llama bradicardiad. La frecuencia cardiaca se calcula dividiendo 300 por el número de cuadros grandes que separan dos ondas R

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