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preload

preload

1 9.0
The amount of blood in the heart just before it squeezes
  • noun
  • /ˈpriˌloʊd/
  • Specialized
translation icon : precarga
  • The net effect of this increased preload stretch is an increase in ventricular contractility with concomitant increases in stroke volume and SBP.
  • preload and afterload
  • cardiac preload

Examples

  • Therefore, hemodynamic goals include maintaining adequate preload and afterload and preventing excessive increases in contractility and tachycardia.

    Academic text (2007)
  • Increased cardiac filling and preload may allow enhanced myocardial performance and SV via the Frank-Starling mechanism.

    Academic text (1991)
  • Small diameter cardiac chambers may provide reliable evidence of low cardiac preload.

    Academic text (2016)
  • When cardiac function is impaired, the relation between central venous pressure and cardiac preload is altered and not reliable.

    Academic text (2003)
  • Sinus rhythm is crucial in these patients because of the dependence of preload on atrial contraction.

    Academic text (2007)
  • The validity of functional cardiovascular monitoring, including measurement of volumetric variables for cardiac preload and cardiovascular filling status, has been proven during the past years.

    Academic text (2003)
  • Hyperdynamic ventricles can be visualized as an attempt to compensate for the abrupt rise in cardiac preload produced by the acute mitral regurgitation.

    Academic text (2016)
  • Maintaining adequate preload is essential for optimizing heart function during surgery.

  • The doctor explained that the patient's preload needed to be monitored to prevent heart complications.

  • Increased preload allows the heart to pump more efficiently, improving blood circulation.

Surface Forms

preload singular
preloads plural

Morphology

preload = load (semi-transparent) = pre + load

The cardiology sense literally refers to the 'load' (volume/pressure) before contraction, but this medical usage is specialized and may not be inferable by learners without medical knowledge.

Etymology

Preload comes from pre- 'before' and load 'an amount or weight', so in medicine it means the amount of blood that fills the heart before it squeezes and this helps explain how hard the heart must work.