Measurement of myocardial oxygen consumption

Correlates of myocardial oxygen demand measured by positron emission tomography in the hypertrophied left ventricle

“…The commonly used surrogates include double product (DP), triple product, and tension-time index. 3 These surrogates are limited by the fact that they do not take left ventricular (LV) size and myocardial contractility into consideration. Baller et al 4 in a canine model demonstrated that relationships between standard surrogates and directly measured MVO 2 became weaker as myocardial contractility increased.…”

Monitoring of pacemaker induced changes in cardiac output with inspired to endtidal oxygen difference in paediatric cardiac surgery patients

“…5% of the total V˙O 2 (9). Atrial pacing in adults has caused a relative increase in myocardial oxygen consumption with 5% per 20 beats·min −1 increased heart rate (10). The lowest recorded SvO 2 was 52%, which we do not interpret as an indication of failing oxygen delivery (11).…”