What is dromotropicity?

If a blood pressure is measured at 160/90, what is the patient’s pulse pressure?

An increase in heart rate subsequently increases contractility of the heart, what is this occurrence known as?

Calculate the vascular resistance of this patient. Renal blood flow = 400 mL/min, Pressure in renal artery = 60 mmHg, Pressure in renal vein = 10 mmHg

HR = 145bpm, End systolic volume = 40 mL, End diastolic volume = 130 mL, Systolic pressure = 130 mmHg, Diastolic pressure 80 mmHg
Calculate patient’s CO?
Calculate patient’s SV?
Calculate patient’s mean arterial pressure (MAP)?