Beat to Beat A Study in Paediatric, Adolescent and Young Adult Patients Who Are Undergoing or Have Undergone Cancer Therapy to Evaluate the Agreement Between QTc Measured Using 12 Lead Electrocardiogram (ECG) and a Wearable Device ECG

A prospective study in paediatric, adolescent and young adult patients aged 7 to 18 years to evaluate the agreement between QTc measured using 12 lead electrocardiogram (ECG) and the wearable device ECG.

Inclusion Criteria:Paediatric or adolescent diagnosis of cancer AND an inpatient of The Royal Children's Hospital, Melbourne for at least 5 days at the time of consent.Patient age ≥ 7 years at time of eligibility screeningIf age < 18 years, parent or guardian able to provide consentParental or participant ( if > 18 years of age) possession of the following at time of eligibility screening, ascertained from automatic hardware/software/device pairing check:iPhone (6s or later) with iOS version 15.0 or later defined as iPhone model/iOS version used to complete screening eligibility.Proficient in written and spoken English, defined by self-report of comfort reading, writing, and speaking English on iPhone.Valid phone number associated with iPhone, ascertained from self-report.Valid email address, ascertained from self-report.Participants or parents need to be able to press down on the wearable device crown for 30 secondsExclusion Criteria:Unable to wear the wearable device.< 18 years of age without guardian or parent to provide consent.Interpreter required for consent purposes.