Informational Site NetworkInformational Site Network
Privacy
 


Home


Medical Articles


Mother's Remedies


Household Tips


Medicine History


Forgotten Remedies


Search

Medical Articles

Disorders Of Muscles And Bones

The Muscles and Bones Have Few Diseases. Considering how comp...

Asepsis

Strict aseptic technic must be observed in all endoscopic pr...

Croup More Serious Form

This is caused by an accumulation of material in the windpipe,...

Endoscopic Operations For Laryngeal Stenosis

Web formations may be excised with sliding punch forceps, or...

Aconite

Is applicable to inflamed eyes, in the early stage, where the...

Heart Disease In Children And During Pregnancy

A common characteristic in a large proportion of middle-age...

The Surgical Dissection Of The First Second Third And Fourth Layers Of The Inguinal Region In Connexion With Those Of The Thigh

The common integument or first layer of the inguino-femoral r...

Bruises Case Xviii

Mrs. C. aged 40, was detained on a journey by a bruised wound...

Punctures Case Iii

A female servant punctured the end of the finger by a pin; th...

Introduction

IN climbing a mountain, if we know the path and take it as a ...

Punctures Case Ix

James Joynes, aged 12, was bitten by an ass, on each side of ...

Vitamins For An Older Healthy Person

Someone who is beyond 35 to 40 years of age should still feel...

Diagnosis From Measles

In scarlatina the heat is much greater, and the pulse is much...

Treatment

The present 100 per cent mortality in cancer of the esophagu...

The Surgical Dissection Of The Superficial Bloodvessels Etc Of The Inguino-femoral Region

Hernial protrusions are very liable to occur at the inguino-f...

Mind Training

IT will be plainly seen that this training of the bod...

Lacing Tight

This produces such serious deformity, and in many ways so inte...

Wounds Syringing

Very great good can often be done by a little careful syringin...

Hay Fever

A most effective preventive and cure for this is the inhaling ...

Contraindications

There is no absolute contraindication to careful esophagosco...



Pathologic Physiology





Category: Uncategorized
Source: Disturbances Of The Heart

The development of permanent injury to one or more valves of the
heart may have been watched by the physician who cares for a patient
with acute endocarditis, or it may have been noted early during the
progress of arteriosclerosis or other conditions of hypertension. On
the other hand, many instances of valvular lesions may be found
during a life-insurance examination, or are discovered by the
physician making a general physical examination for an indefinable
general disturbance or for local symptoms. without the patient ever
having known that he had a damaged heart. The previous history of
such a patient will generally disclose the pathologic cause or the
physical excuse.

As soon as a valve has become injured the heart muscle hypertrophies
to force the blood through a narrowed orifice or to evacuate the
blood coming into a compartment of the heart from two directions
instead of one, as occurs in regurgitation or insufficiency of a
valve. The heart muscle becomes hypertrophied, like any other muscle
which is compelled to do extra work. Which part or parts of the
heart will become most enlarged depends on the particular valvular
lesion. In some instances this enlargement is enormous, increasing a
heart which normally weighs from 10 to 12 ounces to a weight of 20
or even 25 ounces, and extreme weights of from 40 to 50 ounces and
even more are recorded.

As long as the heart remains in this hypertrophied condition, which
may be called normal hypertrophy since it is needed for the work
which has to be done in overcoming the defect in the valve, there
are no symptoms, the pulmonary and systemic circulation is
sufficient, and the patient does not know that he is incapacitated.
Sooner or later, however, the nutrition of the heart, especially in
atheromatous conditions, becomes impaired, and the lack of a proper
blood supply to the heart muscle causes myocardial disturbance,
either a chronic myocarditis or fatty degeneration. If there is no
atheromatous condition of the coronary arteries, and arterial
disease is not a cause of the valvular lesion, compensation may be
broken by some sudden extra strain put on the heart, either muscular
or by some acute sickness or a necessary anesthetic and operation.
From any of these causes the muscle again becomes impaired, and the
heart, especially the part which is the weakest and has the most
work to do relatively to its strength, becomes dilated, compensation
is broken, and all of the various circulatory disturbances resulting
from an insufficient heart strength develop.





Next: Precautions To Be Observed

Previous: Etiology Treatment



Add to del.icio.us Add to Reddit Add to Digg Add to Del.icio.us Add to Google Add to Twitter Add to Stumble Upon
Add to Informational Site Network
Report
Privacy
SHAREADD TO EBOOK


Viewed 1394