{"classes":[{"categories":[{"measurements":[{"groupId":"OG000","value":"4"},{"groupId":"OG001","value":"4"}]}],"title":"Atrial fibrillation"},{"categories":[{"measurements":[{"groupId":"OG000","value":"1"},{"groupId":"OG001","value":"4"}]}],"title":"Tachycardia"}],"denoms":[{"counts":[{"groupId":"OG000","value":"62"},{"groupId":"OG001","value":"58"}],"units":"Participants"}],"description":"ECG assessments included QT, QRS duration, PR interval, ventricular rate, QTcB, QTcF.","groups":[{"description":"Azacitidine 75 mg/m\\^2, infusion, intravenously or subcutaneously, on Day 1 through Day 5, Days 8 and 9 in 28-day treatment cycles until unacceptable toxicity, relapse, transformation to AML (for participants with HR MDS or CMML), or progressive disease (for participants with low-blast AML).","id":"OG000","title":"Azacitidine 75 mg/m^2"},{"description":"Azacitidine 75 mg/m\\^2, infusion, intravenously or subcutaneously, on Day 1 through Day 5, Days 8 and 9 and pevonedistat 20 mg/m\\^2, infusion, intravenously, on Days 1, 3, and 5 in 28-day treatment cycles until unacceptable toxicity, relapse, transformation to AML (for participants with HR MDS or CMML), or progressive disease (for participants with low-blast AML).","id":"OG001","title":"Azacitidine 75 mg/m^2 + Pevonedistat 20 mg/m^2"}],"paramType":"COUNT_OF_PARTICIPANTS","populationDescription":"Safety Population included all enrolled participants who receive at least 1 dose of any study drug azacitidine alone or pevonedistat + azacitidine.","reportingStatus":"POSTED","timeFrame":"From date of first dose up to 30 days after administration of the last dose of any study drug (up to approximately 5 years)","title":"Number of Participants in the Safety Analysis Population With Clinically Significant Change From Baseline in Electrocardiogram (ECG) Values Reported as TEAEs","type":"SECONDARY","unitOfMeasure":"Participants"}