title: Measurement of cardiac index and stroke volume using electrical cardiometry before and after administration of adenosine in a 6-year-old patient with supraventricular tachycardia.
abstract: We report the case of a 6-year-old boy who developed a supraventricular tachycardia during an upper endoscopy while under general anesthesia. A noninvasive electrical cardiometry device was applied to the patient, and cardiac index and stroke volume were measured before and after the administration of adenosine. Cardiac index fell 41% (P < .0001) after adenosine was given, highlighting the known interdependence between cardiac output and heart rate in the pediatric patient. Stroke volume decreased 9% (P = .0002) after adenosine arrested the tachycardia, lending support to an increasing body of data that suggests that heart rate itself can augment contractility.
authors.affiliation: Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital, Boston, MA 02114, USA. Electronic address: svanderhoek@partners.org.
authors.forename: Samuel M
authors.initials: SM
authors.lastname: Vanderhoek
authors.affiliation: Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital, Boston, MA 02114, USA. Electronic address: cjcote@partners.org.
authors.forename: Charles J
authors.initials: CJ
authors.lastname: Coté
mesh_terms: D000241:Adenosine / Q000008:administration & dosage*; D000768:Anesthesia, General / Q000379:methods; D000889:Anti-Arrhythmia Agents / Q000008:administration & dosage*; D002302:Cardiac Output / Q000187:drug effects / Q000502:physiology; D002648:Child; D016099:Endoscopy, Gastrointestinal / Q000379:methods*; D006801:Humans; D008297:Male; D013318:Stroke Volume / Q000187:drug effects / Q000502:physiology; D013617:Tachycardia, Supraventricular / Q000188:drug therapy*
chemical_list: D000889:Anti-Arrhythmia Agents; D000241:Adenosine
keywords: Anesthesia; Arrhythmia; Cardiac output; Monitoring; Pediatrics; Stroke volume