Contractility in tachycardia
- 0Jan 2, '12 by gwapoHi, does somebody know how tachycardia affects contractility? I am confused between 2 possible answers that I can think of - related to B1-stimulation and decreased ventricular filling time. Any input will be very much appreciated. Thanks.
- 1Jan 2, '12 by fiveofpeepLast edit by fiveofpeep on Jan 2, '12 : Reason: added EDV
- 2Jan 2, '12 by PetERNurseBeta-1 agonists will increase contractility and HR, but as the HR increases there is less time spent in diastole and therefore filling time is reduced. There is an optimal HR when using beta-1 agonists, and a HR above that will actually decrease CO (curve is parabolic).