Sentence examples for heart contraction from inspiring English sources

Specifically, the abdomen contracts in a retrograde peristaltic manner exclusively during anterograde heart contraction periods, resulting in increased extracardiac hemolymph propulsion in a dorsoretrograde direction.

Digoxin and digitoxin are commonly prescribed to increase the strength of heart contraction.

Test subjects were monitored using an MRI scanner after drinking the heavily caffeinated beverages, with researchers from the University of Bonn reporting the drinks "significantly increased" heart contraction rates.

The cardiac cycle is defined as the time from the end of one heart contraction to the end of the subsequent contraction and consists of a period of relaxation called diastole followed by a period of contraction called systole.

The sympathetic nervous system is activated under conditions of fright or vigorous activity (the so-called fight-or-flight reaction), where the increase in force and rate of heart contraction are easily felt; the parasympathetic system exerts its influence during periods of rest.

The cAMP intracellular signaling pathway is an important system for signal transmission responsible for the ancestral 'flight or fight' response and involved in the control of critical functions including frequency and strength of heart contraction, energy metabolism and gene transcription.

Measurements on heart contractions obtained by visualizing mosquitoes restrained in the lateral position included the percentage of time the heart contracts in the anterograde and retrograde directions, the frequency of heartbeat directional reversals (a switch from anterograde to retrograde contractions and vice versa), and the length of anterograde and retrograde contraction periods.

More-recent devices are synchronous, or demand, pacemakers that trigger heart contractions only when the normal beat is interrupted.

In the output, area fraction peaks represent individual heart contractions.

No data was collected during periods of retrograde heart contractions because abdominal hemolymph flow lines differ between periods of anterograde and retrograde heart contractions.

Of these abdominal contractions, 95% propagate exclusively during periods of anterograde heart contractions.