|Protectionism.ca - Download the EBook Protectionist|| Informational|
Medical ArticlesMustard Oil
Where this is recommended the cold-drawn oil is meant, not the...
The treatment of a suspected coronary sclerosis is the same a...
The Trying Member Of The Family
"TOMMY, don't do that. You know it annoys your grandf...
The Direction Of The Body In Locomotion
LIFTING brings us to the use of the entire body, whic...
To Prevent Bilious Fever Or Ague
Take _Podophyllin_, _Baptisia_ and _Gelseminum_ 1st in rotati...
Direct Laryngoscopy In Children
The epiglottis in children is usually strongly curled, often...
Cold baths, while greatly to be recommended to those who are s...
Direct laryngoscopy, bronchoscopy, esophagoscopy and gastrosc...
This results from severe damp chills, usually following exhaus...
Chronic Myocarditis Fibrous
Chronic myocarditis may develop on an acute myocarditis, but ...
Earache - Otalgia
This may arise from various causes, but a common one is sudde...
General Tonic Treatment
Take the B D current, (A D is very good), of fair medium stre...
Weight Loss By Fasting
Loss of weight indicates, almost guarantees, that detoxificat...
Disturbances Of The Heart In General
Of prime importance in the treatment of diseases of the hea...
Affection Of The Cerebellum And Spine
In affections of the _cerebellum_ and _spinal marrow_, the pa...
Take the B D Faradaic current--moderate strength. If the affe...
The diet of the sick should he nutricious, but at all times s...
The Dissection Of The Oblique Or External And The Direct Or Internal Inguinal Herniae
The order in which the herniary bowel takes its investments f...
I shall give a couple of illustrations: In the winter of 1...
The author wishes to caution the reader not to rely merely on...
Physics Of Mitral Stenosis
Source: Disturbances Of The Heart
Mitral stenosis, though less common than mitral regurgitation, is a
frequent form of disease of the valves, especially in women. Often
this condition is associated with regurgitation; but in a simple
mitral stenosis the greatest hypertrophy is of necessity in the
right ventricle. The left auricle finds it difficult to empty all of
its blood into the left ventricle during the ordinary diastole of
the heart. This auricle then somewhat hypertrophies, but is unable
to prevent more or less damming back of the blood into the lungs
through the pulmonary veins. This causes passive congestion of the
lungs, and the right ventricle finds that it must labor to overcome
the increased resistance in the pulmonary artery, and hypertrophies
to overcome this increased amount of work. When this condition has
become perfected, compensation is established and the circulation is
apparently normal. Nature causes these hearts, when they are
disturbed or excited, to pulsate slowly, causing the diastole to be
longer than in a heart with mitral regurgitation. This allows more
blood to enter the left ventricle, and the left ventricle, acting
perfectly on the blood which it receives, causes a good systolic
pressure in the aorta and the systemic arteries. The left ventricle
in this condition does not become hypertrophied. If the heart does
act rapidly and the left ventricle contracts on an insufficient
amount of blood, the peripheral pulse is necessarily small and the
arterial tension is diminished. Very constant in this condition, and
of course noticeable whenever there is pulmonary congestion, is the
sharp, accentuated closure of the pulmonary valve. The lungs on the
least exertion are always a little overfilled with blood. The
pulmonary circulation is always working at a little disadvantage.
The first symptoms of lack of compensation with the lesion of mitral
stenosis are lung symptoms--dyspnea, cough, bronchitis, slight
cyanosis, sometimes blood streaks in the expectorated mucus and
froth, and, if the congestion is considerable, some edema of the
posterior part of the lungs, if the patient is in bed. Sooner or
later during this failing compensation the right ventricle becomes
dilated, and the symptoms of cardiac insufficiency and venous
congestion occur, as described above with mitral insufficiency.
Again, as in mitral insufficiency, if compensation is restored in
mitral stenosis, these symptoms are improved. These patients,
however, are never quite free from dyspnea on exertion. Any
inflammation of the lungs, even a severe bronchitis, is more or less
serious for the patients and their hearts. The mucous membrane of
their bronchial tubes and air vesicles is always hyperemic, and it
takes little more congestion to all but close up some of the
passages. and dyspnea or asthma, or suffocating, difficult cough is
Next: Physics Of Aortic Lesions