which compensatory mechanism is spontaneously used by children diagnosed with tetralogy of fallot to relieve hypoxic spells?
Which compensatory mechanism is spontaneously used by children diagnosed with tetralogy of Fallot to relieve hypoxic spells? a. Lying on their left side c. Squatting b. Performing the Valsalva maneuver d. Hyperventilating ANS: C Squatting is a spontaneous compensatory mechanism used by older children to alleviate hypoxic spells. Squatting and its variants increase systemic resistance while decreasing venous return to the heart from the inferior vena cava.