Model study of hypertension originating an increased cardiac ejection fraction

J. C. Hsieh, C. J. Tai, J. K J Li

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Hypertension is normally associated with vascular change by increased afterload. But hypertension is also observed without increased peripheral resistance in the patients with normal stroke volume but increased heart rates. To understand the interactions between vascular change and cardiac ejection fraction that leads to primary hypertension, a computer simulation of arterial model was developed. Experimental aortic pressure, Pa(t), and aortic flow, Qa(t), derived from the data on mongrel dogs, were digitized then incorporated into the lumped arterial system model. By manipulating the peripheral resistance (Rs), the systemic capacitance (Cs), and the Qa(t), the Pa(t) was studied. Results indicated that (l) elevated Pa(t) caused by 20% increased ejection fraction can be observed in reduced peripheral resistance and increased systemic capacitance; and that (2) by power spectrum analysis, the amplitude of input impedance in cardiac-induced hypertensive atrial system showed 40% lower oscillation than vascular-induced hypertension. Our results showed cardiac-induced hypertension has opposing effects on the change of peripheral vascular resistance in terms of time and frequency. In conclusion, our simulation indicated a predicted hyperdynamic state of aortic pressure without increased peripheral resistance. This is referred to as hypertension of cardiac origin.

Original languageEnglish
Title of host publicationComputers in Cardiology
PublisherIEEE
Pages553-556
Number of pages4
Publication statusPublished - 2000
Externally publishedYes

Fingerprint

Vascular Resistance
Capacitance
Hypertension
Power spectrum
Spectrum analysis
Blood Vessels
Arterial Pressure
Computer simulation
Electric Impedance
Computer Simulation
Stroke Volume
Spectrum Analysis
Heart Rate
Dogs

ASJC Scopus subject areas

  • Software
  • Cardiology and Cardiovascular Medicine

Cite this

Hsieh, J. C., Tai, C. J., & Li, J. K. J. (2000). Model study of hypertension originating an increased cardiac ejection fraction. In Computers in Cardiology (pp. 553-556). IEEE.

Model study of hypertension originating an increased cardiac ejection fraction. / Hsieh, J. C.; Tai, C. J.; Li, J. K J.

Computers in Cardiology. IEEE, 2000. p. 553-556.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Hsieh, JC, Tai, CJ & Li, JKJ 2000, Model study of hypertension originating an increased cardiac ejection fraction. in Computers in Cardiology. IEEE, pp. 553-556.
Hsieh JC, Tai CJ, Li JKJ. Model study of hypertension originating an increased cardiac ejection fraction. In Computers in Cardiology. IEEE. 2000. p. 553-556
Hsieh, J. C. ; Tai, C. J. ; Li, J. K J. / Model study of hypertension originating an increased cardiac ejection fraction. Computers in Cardiology. IEEE, 2000. pp. 553-556
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