[{"word":"extrasystoles","phonetics":[],"meanings":[{"partOfSpeech":"noun","definitions":[{"definition":"A premature contraction of the heart, producing an interruption or irregularity in heartbeat rhythm, associated with heart disease or the use of some pharmaceuticals.","synonyms":[],"antonyms":[]}],"synonyms":["PVC","premature ventricular contraction","VPB","ventricular premature beat"],"antonyms":[]}],"license":{"name":"CC BY-SA 3.0","url":"https://creativecommons.org/licenses/by-sa/3.0"},"sourceUrls":["https://en.wiktionary.org/wiki/extrasystole","https://en.wiktionary.org/wiki/extrasystoles"]}]