[Article in German] BÃ¶hm M. Adenosine has a negative inotropic effect in cardiac atrial preparations (direct negative inotropic effect). This effect is probably due to an activation of a potassium outward current which shortens the action potential duration and hence reduces the force of contraction.
A scatterplot is a graph that is used to plot the data points for two variables. Each scatterplot has a horizontal axis (x-axis) and a vertical axis (y-axis). One variable is plotted on each axis.
Scatter plots are useful data visualization tools for illustrating a trend. 1  If the vertical (or y-axis) variable increases as the horizontal (or x-axis) variable increases, the correlation is positive.  If the y-axis variable decreases as the x-axis variable increases or vice-versa, the correlation is negative.