Final answer:
Increasing stroke volume leads to a rise in cardiac output and blood pressure, as there is more blood being pumped with each heartbeat. However, an excessively high heart rate can eventually counter the increase in stroke volume, potentially decreasing cardiac output.
Step-by-step explanation:
Increasing stroke volume (SV) will alter cardiac output (CO) and blood pressure (BP) by elevating them. Cardiac output is calculated as the product of heart rate (HR) times stroke volume (SV), as CO = HR × SV. When the stroke volume increases, the amount of blood ejected with each heartbeat is greater, thereby increasing the overall cardiac output. As cardiac output rises, blood pressure generally tends to increase as well because there is more blood being circulated by the heart which needs to be accommodated by the blood vessel system. During states such as exercise, both heart rate and stroke volume can increase to meet the body's demand for more oxygen and nutrient supply, leading to an increase in cardiac output and blood pressure. However, it is important to monitor these changes as very high heart rates can decrease the stroke volume due to less ventricular filling time, which eventually may decrease the cardiac output.