Table 2.

Search strategy (Nov 5, 2021)

Database	Search strategy	Records
EMBASE	1.(Smart watch* or smartwatch* or activity monitor* or activity track* or fitness track* or wearable device* or wearable tech* or wearable sensor* or ambulatory device* or photoplethysmograph*).ti,ab	133
	2. (Apple watch* or Fitbit* or GearFit or Garmin or Withings or Amazfit or Microsoft band or Xiaomi or Komodo AIO Smart Sleeve or WHOOP band or Stifit band or Misfit or Amiigo).ti,ab
	3.(Heart rate* or tachycardi* or bradycardi* or murmur* or arrhythmia* or ECG or electrocardiograph* or cardiovasc*).mp
	4. (Race* or ethnic* or skin col* or skin tone* or Caucasian* or African* or Black).mp
	5. 1 OR 2
	6. 3 AND 4 AND 5
MEDLINE	1. (Smart watch* or smartwatch* or activity monitor* or activity track* or fitness track* or wearable device* or wearable tech* or wearable sensor* or ambulatory device* or photoplethysmograph*).ti,ab	52
	2. (Apple watch* or Fitbit* or GearFit or Garmin or Withings or Amazfit or Microsoft band or Xiaomi or Komodo AIO Smart Sleeve or WHOOP band or Stifit band or Misfit or Amiigo).ti,ab
	3. (Heart rate* or tachycardi* or bradycardi* or murmur* or arrhythmia* or ECG or electrocardiograph* or cardiovasc*).mp
	4. (Race* or ethnic* or skin col* or skin tone* or Caucasian* or African* or Black).mp
	5. 1 OR 2
	6. 3 AND 4 AND 5
CINAHL	1. (MM "Wearable Sensors + ") OR "(Smart watch* or smartwatch* or activity monitor* or activity track* or fitness track* or wearable device* or wearable tech* or wearable sensor* or ambulatory device* or photoplethysmograph*"	60
	2. (Apple watch* or Fitbit* or GearFit or Garmin or Withings or Amazfit or Microsoft band or Xiaomi or Komodo AIO Smart Sleeve or WHOOP band or Stifit band or Misfit or Amiigo)
	3. (MH "Heart Rate Variability") OR (MM "Heart Murmurs") OR (MM "Heart Rate") OR (MM "Electrocardiography, Ambulatory") OR "(Heart rate* or tachycardi* or bradycardi* or murmur* or arrhythmia* or ECG or electrocardiograph* or cardiovasc*).mp."
	4. 1 OR 2
	5. 4 AND 3
Cochrane CENTRAL	1. Smart watch* or smartwatch* or activity monitor* or activity track* or fitness track* or wearable device* or wearable tech* or wearable sensor* or ambulatory device* or photoplethysmograph* or Apple watch* or Fitbit* or GearFit or Garmin or Amazfit or Microsoft band or Xiaomi or Komodo AIO Smart Sleeve or WHOOP band or Stifit band or Misfit or Amiigo	377
	2. Heart rate* or tachycardi* or bradycardi* or murmur* or arrhythmia* or ECG or electrocardiogra*
	3. Race* or ethnic* or (skin col*) or (skin tone*) or Caucasian* or African*