The abdominojugular reflux test was performed by applying firm, sustained pressure to the center of the abdomen. A sustained increase in jugular venous pressure (JVP) of more than 3 cm of water for more than 10 seconds, as occurred in this patient, indicates a positive test. (A transient increase in JVP that returns to baseline in 10 seconds or less while abdominal pressure is applied would indicate a negative test.) | The New England Journal of Medicine