Terms: Heart Rate Variability (829,000), variable heart rate (1,510), fluctuating heart rate (314), changing heart rate (3,350), heart rate changes (85,000), heart rate fluctuations (10,100), variation in heart rate (2,940), alterations in heart rate (2,990),
Terms: heart beat (8,710,000), heart beats (3,330,000), heartbeat (37,000,000), heartbeats (4,150,000), irregular heart (1,020,000), irregular cardiac (4,480), irregular rhythm (109,000), abnormal heart (1,190,000), abnormal heartbeats (69,700), abnormal heartbeat (124,000), irregular pulse (176,000),
Terms: heart rate (32,300,000), heart rates (1,450,000), heart rate monitor (3,940,000), heart rate monitors (6,320,000), heart rate correlations (22), heart monitor (1,840,000), cardiac rhythm monitoring (1,480),
Terms: cardiac cycle (400,000), cardiac rhythm (830,000), ECG (9,630,000), ECG interpretation (186,000), ECG atlas (84), atlas of ECG (144), cardiac electrophysiology (641,000),
Boolean: cardiac +electrophysiology (2,380,000), heart +electrophyiology (154),
Terms: heart rhythm (2,880,000), heart rhythms (1,040,000), cardiac rhythm (830,000), cardiac rhythms (72,700), ECG rhythms (3,620), electrocardiogram rhythms (55),
Terms: electrocardiogram (3,390,000), electrocardiograms (791,000), cardiogram (246,000), cardiograph (118,000), electrocardiography (1,160,000), electrocardiography (1,160,000), electrocardiographic (968,000),
Terms: arrhythmia (5,660,000), tachycardia (4,600,000), atrial fibrillation (4,910,000), atrial flutter (455,000), cardiac arrhythmia (1,200,000), dysrhythmia (428,000),
Terms: pulse rate (2,280,000), pulse rates (261,000), pulse rate variations (69), variable pulse rate (1,050), pulse rate fluctuations (119),
Boolean: cardiac +fluctuation (219,000), cardiac +fluctuations (627,000), cardiac +variation (2,890,000), cardiac +variability (2,050,000), cardiac +changing (4,980,000), cardiac +random (3,000,000),
Boolean: heart +arrhythmia (4,580,000), heart +dysrhythmia (237,000),
Boolean: stress + heart +variability (1,970,000), stress +cardiac +fluctuations (268,000), stress +heart +fluctuations (1,250,000), stress +heart + variations (4,050,000), stress + heart + variable (5,750,000),