Page:Alcohol, a Dangerous and Unnecessary Medicine.djvu/89

Rh "The explanation is not difficult. It depends entirely on the different views of what constitutes the work of the heart.

"One class of investigators, led by the original and valuable experiments of Parkes and Wollowicz base their estimate of the heart's work entirely on the number of times it contracts or beats per minute. Thus Dr. Parkes, finding that moderate doses of alcohol increased the number of contractions of the heart from three to six beats per minute more than natural, readily estimated the number of additional contractions that would occur in twenty-four hours, and thereby demonstrated a large amount of increased work done by the heart under the influence of alcohol. All writers who speak of 'stimulating' or increasing the action of the heart by alcohol follow this method of measuring the amount of work done. They generally add that it is like applying 'the whip to a tired horse.'

"The other class of investigators who claim that alcohol diminishes the actual work done by the heart base their estimates on the amount of blood the heart passes through its cavities into the arteries in a given time. This is the physiological function of the heart; i. e. to aid in circulating the blood. Professor Martin's experiments were admirably contrived to determine, not how frequently the heart beat, but the amount of blood it delivered per minute under the influence of alcohol and without alcohol.

"He, and all others who take this basis of work, found that alcohol in any dose diminished the efficiency of the heart in circulating the blood in direct ratio to the quantity taken.

"My own original experiments, made fifty years ago, uniformly showed that alcohol quickly increased the number of heart beats per minute, but at the same time diminished the efficiency of the circulation generally. Every experienced practitioner knows that the weaker the heart becomes, the faster it beats. Consequently, the number of times the heart contracts per minute is no measure of the efficiency of its work in