{"id":"https://openalex.org/keywords/rmssd","display_name":"RMSSD","description":"A time-domain heart rate variability measure calculated as the root mean square of successive differences between heartbeat intervals.","display_name_alternatives":["root mean square of successive differences","root mean square successive difference","root mean square of successive RR interval differences","root mean square of successive heartbeat interval differences","rMSSD heart rate variability"],"ids":{"openalex":"https://openalex.org/keywords/rmssd","wikidata":null},"primary_topic":{"id":"https://openalex.org/T10745","display_name":"Heart Rate Variability and Autonomic Control","score":0.6859,"subfield":{"id":"https://openalex.org/subfields/2705","display_name":"Cardiology and Cardiovascular Medicine"},"field":{"id":"https://openalex.org/fields/27","display_name":"Medicine"},"domain":{"id":"https://openalex.org/domains/4","display_name":"Health Sciences"}},"topics":[{"id":"https://openalex.org/T10745","display_name":"Heart Rate Variability and Autonomic Control","score":0.6859,"subfield":{"id":"https://openalex.org/subfields/2705","display_name":"Cardiology and Cardiovascular Medicine"},"field":{"id":"https://openalex.org/fields/27","display_name":"Medicine"},"domain":{"id":"https://openalex.org/domains/4","display_name":"Health Sciences"}}],"works_count":2899,"cited_by_count":38950,"works_api_url":"https://api.openalex.org/works?filter=keywords.id:keywords/rmssd","updated_date":"2026-10-22T04:07:25","created_date":"2026-09-30T00:00:00"}
