Cardiac Injuries

Anomalies and Curiosities of Medicine
by George M. Gould, M.D., Walter L. Pyle, M.D.

(Page 18 of 42)

For ages it has been the common opinion relative to injuries of the heart that they are necessarily fatal and that, as a rule, death immediately follows their reception. Notwithstanding this current belief a careful examination of the literature of medicine presents an astounding number of cases in which the heart has been positively wounded, and the patients have lived days, months, and even recovered; postmortem examination, by revealing the presence of cicatrices in the heart, confirming the original diagnosis. This question is one of great interest as, in recent years, there has been constant agitation of the possibility of surgical procedures in cardiac as well as cerebral injuries.

Del Vecchio has reported a series of experiments on dogs with the conclusion that in case of wounds in human beings suture of the heart is a possible operation. In this connection he proposes the following operative procedure: Two longitudinal incisions to be made from the lower border of the 3d rib to the upper border of the 7th rib, one running along the inner margin of the sternum, the other about ten mm. inside the nipple-line. These incisions are joined by a horizontal cut made in the fourth intercostal space. The 4th, 5th, and 6th ribs and cartilages are divided and the outer cutaneous flaps turned up; pushing aside the pleura with the finger, expose the pericardium and incise it longitudinally; suture the heart-wound by interrupted sutures.

Del Vecchio adds that Fischer has collected records of 376 cases of wounds of the heart with a mortality two to three minutes after the injury of 20 per cent. Death may occur from a few seconds to nine months after the accident. Keen and Da Costa quote Del Vecchio, and, in comment on his observations, remark that death in cases of wound of the heart is due to pressure of effused blood in the pericardial sac, and, because this pressure is itself a cheek to further hemorrhage, there seems, as far as hemorrhage is concerned, to be rather a question whether operative interference may not be itself more harmful than beneficial. It might be added that the shock to the cardiac action might be sufficient to check it, and at present we would have no sure means of starting pulsation if once stopped. In heart-injuries, paracentesis, followed, if necessary, by incision of the pericardium, is advised by some surgeons.

Realizing the fatality of injuries of the heart, in consequence of which almost any chance by operation should be quickly seized by surgeons rather than trust the lives of patients to the infinitesimal chance of recovery, it would seem that the profession should carefully consider and discuss the feasibility of any procedure in this direction, no matter how hypothetic.

Hall states that his experience in the study of cardiac wounds, chiefly on game-animals, would lead him to the conclusion that transverse wounds the lower portions of the heart, giving rise to punctures rather than extensive lacerations, do not commonly cause cessation of life for a time varying from some considerable fraction of a minute to many minutes or even hours, and especially if the puncture be valvular in character, so as to prevent the loss of much blood. However, if the wound involve the base of the organ, with extensive laceration of the surrounding parts, death is practically instantaneous. It would seem that injury to the muscular walls of the heart is much less efficient in the production of immediate death than destruction of the cardiac nervous mechanism, serious irritation of the latter producing almost instantaneous death from shock. In addition, Hall cites several of the instances on which he based his conclusions.

He mentions two wild geese which flew respectively 1/4 and 3/4 of a mile after having been shot through the heart, each with a pellet of BB shot, the base in each instance being uninjured; in several instances antelope and deer ran several rods after being shot with a rifle ball in a similar manner; on the other hand, death was practically instantaneous in several of these animals in which the base of the heart was extensively lacerated.

Again, death may result instantaneously from wounds of the precordial region, or according to Erichsen, if held directly over the heart, from the discharge of a pistol containing powder alone, a result occasionally seen after a blow on the precordial region. It is well, however, to state that in times of excitement, one may receive an injury which will shortly prove fatal, and yet not be aware of the fact for some time, perhaps even for several minutes. It would appear that the nervous system is so highly tuned at such times, that it does not respond to reflex irritations as readily as in the absence of excitement.