+ Site Statistics
+ Search Articles
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on LinkedInFollow on LinkedIn

+ Translate

Separate contribution of ventricular pumping and load impedance on ventricular power output

Separate contribution of ventricular pumping and load impedance on ventricular power output

Medical Hypotheses 7(8): 1067-1078

The heart is a special type of fluid pump in the sense that it is an organic pump. It is postulated here that the heart behaves like any other mechanical pump whose power output may assume, for a primary change in load, values bounded by 2 limits which are power output values obtained had the pump been a pressure generator and a flow generator, respectively. A power output value outside the limits would imply a definite alteration in ventricular pump function concomitant with the load change. A nomogram to illustrate the proposal is included. The hypothesis may be developed into a powerful tool for assessing the pumping capability of the left ventricle; this has significant clinical and physiological implications.

(PDF emailed within 0-6 h: $19.90)

Accession: 006390474

Download citation: RISBibTeXText

PMID: 7289914

DOI: 10.1016/0306-9877(81)90102-X

Related references

Clinical Safety and Efficacy of Autologous Bone Marrow-Derived Mesenchymal Stem Cell Transplantation in Sensorineural Hearing Loss Patients. Journal of Audiology & Otology: -, 2018

The validation and repeatability of a non invasive measurement of arterial load and left ventricular power output. European Heart Journal 13(ABSTR SUPPL): 415, 1992

Noninvasive determination of aortic input impedance and external left ventricular power output: A validation and repeatability study of a new technique. Journal of the American College of Cardiology 20(4): 952-963, 1992

Flow and power output of right ventricle facing load with variable input impedance. American Journal of Physiology 237(2): H125-H130, 1979

Use of echocardiography reveals reestablishment of ventricular pumping efficiency and partial ventricular wall motion recovery upon ventricular cryoinjury in the zebrafish. Plos One 9(12): E115604-E115604, 2015

Patterns of cardiac output response to acute reduction of ventricular pre load and after load pressures. American Journal of Cardiology 25(6): 662-669, 1970

Prognostic value of cardiac power output to left ventricular mass in patients with left ventricular dysfunction and dobutamine stress echo negative by wall motion criteria. European Heart Journal Cardiovascular Imaging (): -, 2016

Increase of ventricular output inducing ventricular afterpotential sensing and ventricular safety pacing in a biventricular implanted cardioverter defibrillator. Europace 12(1): 142-145, 2010

Cyclic changes in right ventricular output impedance during mechanical ventilation. Journal of Applied Physiology 87(5): 1644-1650, 1999

Influence of changes in pulsatile components of vascular load on left ventricular function power load relations in patients without heart failure. Circulation Supplement 60(2): II-94, 1979

Quantitation of the effective right ventricular output in patients with pulmonary atresia and intact ventricular septum after placement of a right ventricular outflow patch and an aorticopulmonary shunt. Catheterization and Cardiovascular Diagnosis 32(2): 113-116, 1994

Left ventricular load, arterial impedance and their interrelationship. Cardiovascular Research 13(4): 183-198, 1979

The effects of halothane on the interactions between myocardial contractility, aortic impedance and left ventricular performance. II. Aortic input impedance, and the distribution of energy during ventricular ejection. British Journal of Anaesthesia 44(8): 767-775, 1972

Pulsed doppler cardiac output and left ventricular pumping ability measurements during artificial ventilation. Anesthesiology (Hagerstown) 61(3 PART A): A170, 1984