The patient became severely. confused, agitated and combative approximately 12 hours after the first dose of. levofloxacin. The patientâs oxygen saturations were within normal limits, electrolytes. within normal limits, and no other cause for his change in mental status was apparent.
Stroke volume increases during exercise because the body's demand for more oxygen-filled blood increases, and an increase in stroke volume, due to contractions that are more powerful, will help eject...
back | next Stroke Volume Index. Stroke volume index is the volume of blood pumped by the heart with each beat (in milliliters) divided by the body surface area (square meters). This allows direct comparison of the stroke volume index of large and small patients. Stroke volume index is determined by three factors: 1  Preload: The filling pressure of the heart at the end of diastole. 2  Contractility: The inherent vigor of contraction of the heart muscles during systole. 3  Afterload: The pressure against which the heart must work to eject blood during systole.