Afterload is increased when aortic pressure and systemic vascular resistance are increased, by aortic valve stenosis, and by ventricular dilation. When afterload increases, there is an increase in end-systolic volume and a decrease in stroke volume.
Best Answer: Sharks typically swim with the even, liquid grace of a creature completely at home with its place in the Universe. Large sharks generally cruise at a leisurely 1.5 miles (2.4 kilometres) per hour.Because most species fare poorly in captivity, the maximum swimming speed of a shark has seldom been measured.f, as Thorburn and Bhana attest, the shark did indeed start from a standstill-which seems behaviorally unlikely-to cover the stated distance in the stated time, the little Mako must have achieved an acceleration of at least 50 feet (15 metres) per second, per second.
Answer by Longhorn69. Confidence votes 227. Sharks swim at an average speed of 5 MPH but when feeding or attacking they can reach speeds upwards to 12 MPH. The shortfin mako can reach speeds up to 31 MPH. It's alot faster than 1 mph, a human swims 2-5 mph average.   It depends on what kind of shar â¦ k, but the mako can get up to 45-50  mph in short bursts. When a shark is hitting prey from underneath  they can reach up to 30mph. 12 people found this useful.