Medical ArticlesThe Surgical Dissection Of The Superficial Structures Of The Male Perinaeum
The median line of the body is marked as the situation where ...
Physical Signs In Esophageal Foreign Body
There are no constant physical signs associated with uncompli...
Period Of Incubation Or Hatching
The time which passes between the reception of the contagious...
The only sure sign of the presence of this parasite in the int...
Functional Hiatal Stenosis Hiatal Esophagismus Phrenospasm Diaphragmatic Pinchcock Stenosis
There is no sphincteric muscular arrangement at the cardiac o...
There is a usual (normal) temperature in all the blood and tis...
Often in the case of delicate infants or children, the bones o...
The Lower Animals
It may, by some, be objected that, if we regard sensation as ...
Breath And The Skin
The organs of breathing remove much waste from the system, but...
under a well conducted course of hydriatic treatment is, in g...
Burns Case Xxxv
The following case will present a specimen of my trials of th...
Skin eruptions, known under this name, have very various cause...
Accidents And Emergencies
Ordinarily, Accidents are not Serious. Accidents will happe...
TO argue with nervous anxiety, either in ourselves or...
These will be found dealt with under many headings throughout ...
The Rational Care Of Self
A WOMAN who had had some weeks of especially difficul...
Sprains Or Racks
A sprain is usually the result of some involuntary stress comi...
I KNEW an old German--a wonderful teacher of the spea...
A whispering voice can always be had as long as air can pass...
Often, in the young, the bones are so soft that they bend more...
Physics Of Aortic Lesions
Source: Disturbances Of The Heart
Next in frequency to mitral insufficiency is aortic insufficiency,
which occurs most frequently in men. The cavity of the heart that is
most affected by this lesion is the left ventricle, which receives
blood both from the left auricle, and regurgitantly from the aorta.
This part of the heart, being the strongest muscular portion, is the
part most adapted to hypertrophy, and the hypertrophy with this
lesion is often enormous. For a long time this large muscular
section of the heart can overcome all difficulties of the aortic
insufficiency. The pulse, however, will always show the quickly lost
arterial pressure of every beat on account of the aorta losing its
pressure through the regurgitant flow of blood. Sooner or later,
from the impaired aortic tension causing a diminished or imperfect
flow of blood through the coronary arteries, impaired nutrition of
the heart muscle occurs. In other words, an intestinal or chronic
myocarditis or fibrosis develops, with perhaps later a fatty
degeneration. When this condition occurs, of course, the repair of
the heart is impossible.
This form of valvular lesion is the one that is most likely to cause
sudden death. In aortic regurgitation Nature causes the heart to
beat rapidly. Such a heart must never beat slowly, as the longer the
diastole prevails the more blood will regurgitate into the left
ventricle, and death may occur from sudden anemia of the base of the
brain. Such a heart may, of course, receive a sudden strain, or the
left ventricle may dilate, and yet serious myocarditis or fatty
degeneration may not have occurred.
The signs of lack of compensation are generally cardiac distress,
rapid heart, insufficiency of the systolic force of the left
ventricle, and therefore impaired peripheral circulation, a sluggish
return circulation, pendent edemas, and soon, with the left auricle
finding the left ventricle. insufficiently emptied, the damming back
of the blood is in broken compensation with the mitral lesions.
Next: Aortic Stenosis
Previous: Physics Of Mitral Stenosis