G. Hellige

A critical look at currently used indirect indices of myocardial oxygen consumption

SummaryMyocardial oxygen consumption indices that are frequently applied to man such as tension-time index (TTI), pressure-rate product (P·HR) and triple product (TP) have not been fully validated so far. These easily obtainable indices and a modified TTI

Regional lung perfusion as determined by electrical impedance tomography in comparison with electron beam CT imaging

(\overline P \cdot \sqrt {HR} )

Thoracic electrical impedance tomographic measurements during volume controlled ventilation-effects of tidal volume and positive end-expiratory pressure

, therefore, were examined in 10 closed-chest dogs with very broad variations of hemodynamics and oxygen consumption (3–36 ml/min·100 g) analyzing 162 steady states. Myocardial blood flow was directly measured by a differential pressure coronary sinus catheter.

Imaging pathologic pulmonary air and fluid accumulation by functional and absolute EIT

M\dot VO_2

Regional pulmonary pressure volume curves in mechanically ventilated patients with acute respiratory failure measured by electrical impedance tomography.

was varied by administration of catecholamines and other inotropic drugs, atropine, beta-blocking agents and hypo- and hypervolemia. Over a wide range of hemodynamic states, correlations with directly measured