Effect of Phlebotomy on Heartrate in Polycythemia Patients
Trial Parameters
Brief Summary
Single-centre, observational within-subject design: patients that undergo phlebotomies regularly for polycythemia will be measured continuously by wearables one week before until one week after a phlebotomy, for three phlebotomies.
Eligibility Criteria
Inclusion Criteria: * Patients with polycythaemia, requiring phlebotomy on a regular basis (at least every 4 months) * Subjects aged ≥18 years * In possession of a smartphone * Life expectancy ≥ 3 months Exclusion Criteria: * Poor performance/functional status (Eastern Cooperative Oncology Group system ECOG ≥3) * Participants with known arrhythmias or other significant cardiological conductivity disorders (Paroxysmal atrial fibrillation is allowed) * Hospitalized subjects * Subjects with a pacemaker. * Subjects with a secondary polyglobulia due to eg smoking or other pulmonary issues. * Scheduled oncological treatments or surgery during the study period.