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Table 3 Visual assessment of left ventricular ejection fraction (LVEF) using the full-feature ultrasound system*

From: Assessment of left ventricular ejection fraction using an ultrasonic stethoscope in critically ill patients

  Visual assessment of LVEF with the full-feature system
Reference LVEF Increased
LVEF > 75%
Normal
LVEF: 50 to 75%
Moderately depressed
LVEF: 30 to 49%
Severely depressed
LVEF < 30%
Increased 3 5 0 0
Normal 6 43 2 0
Moderately depressed 0 2 11 1
Severely depressed 0 0 4 7
  1. *: Biplane LVEF measured off-line with the Simpson's rule using the same ultrasound system was used as a reference.