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Table 2 Non-invasive tests along with their diagnostic yield in the study population

From: Syncope: experience at a tertiary care hospital in Karachi, Pakistan

Diagnostic test na/Nb (%)
Electrocardiogram 34/258 (13)
Troponin I 4/180 (2)
Echocardiogram 13/92 (7)
Holter monitoring 6/46 (13)
Head-up tilt test 15/38 (39)
Stress test 4/28 (14)
EEG 0/22 (0)
Magnetic resonance imaging 0/18 (0)
Myocardial perfusion scan 3/16 (19)
Dobutamine echo 1/11 (9)
Head computed tomography scan 0/10 (0)
Carotid Doppler 0/7 (0)
  1. aNumber of patients with positive diagnostic test
  2. bNumber of patients who underwent the test