What does SV stand for?

Changes to cardiovascular system in pregnancy [up arrow] Plasma volume [down arrow] Red blood cells (physiological anaemia) [down arrow] Resistance in systemic circulation [down arrow] Pulmonary vascular resistance Blood pressure: systolic--stays the same diastolic [down arrow] [up arrow] Heart rate [up arrow] Stroke volume [up arrow] Cardiac output [up arrow] Oedema of hands, feet and ankles Heart moves upward and laterally [up arrow] Heart size Heart disease can be newly diagnosed in pregnancy, and the midwife may be the first health professional to see the woman.

An increased stroke volume is achieved through interval training.

When the heart needs to pump more blood, it increases stroke volume and heart rate.

The pacing rate (PR) of implanted pacemakers must be adaptive to the patient's physical workload to ensure the required cardiac output (CO), which is the product of stroke volume (SV) and heart rate (HR).

As a result of these factors, the stroke volume decreases and systolic blood pressure falls (Sulzbach, 1988; Urden, Stacy, & Lough, 2006; Woods, Froelicker, Motzer, & Bridges, 2005).

Abstract Increases in cardiac mass, ventricular dimensions, and stroke volume are typically observed in obese adults, accompanied by evidence of diminished ventricular systolic and diastolic function.

This allows ventricular ejection to occur prior to relaxation of septum improving the stroke volume and other systolic indices like LV dp/dt.

Therefore the workload or output of the heart can be calculated by: Heart rate x Stroke volume An individual who engages regularly in physical activity will have a greater stroke volume meaning more blood/oxygen will be pumped to the working muscles with each heartbeat.