<?xml version="1.0" encoding="utf-8"?><mads xmlns="http://www.loc.gov/mads/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.loc.gov/mads/
	mads.xsd"><authority><topic authority="http://www.serbi.ula.ve/tematres/vocab/">FRECUENCIA CARDIACA</topic></authority><related type="narrower"><topic>ARRITMIA</topic></related><related type="other"><topic>PULSO</topic></related><related type="broader"><topic>HEMODINAMICA</topic></related><related type="broader"><topic>SISTEMA DE CONDUCCION CARDIACA</topic></related><variant type="other"><topic>Ciclo cardíaco</topic></variant><variant type="other"><topic>Ciclo del corazón</topic></variant></mads>