Out in the sky the great dark clouds are massing; I look far out into the pregnant night, Where I can hear a solemn booming gun And catch the gleaming of a random light, That tells me that the ship I seek is passing, passing. My tearful... Read more of Ships That Pass In The Night at Martin Luther King.caInformational Site Network Informational


Medical Articles

Mother's Remedies

Household Tips

Medicine History

Forgotten Remedies


Medical Articles

To Prevent Yellow Fever

Take _Aconite_, _Belladonna_ and _Macrotin_, 1st in rotation ...

Introduction Of The Esophagoscope

The esophagoscope is to be passed only with ocular guidance, ...

The Half-bath The Sitz- Or Hip-bath

Should the half-bath or shallow-bath (which are technical ter...


Where we prescribe this, either for drinking or for external u...


This disease consists in a looseness of the bowels, generally...


The prognosis is very uncertain. This infirmity is often cure...

Blood Poisoning

(See Blood, Purifying; Sores). ...

Bowels Reversed

See Bowels, Locking of, above. ...

The Eye

How the Eye is Made. Next in importance after the smell and t...

Pulmonary Insufficiency Pulmonary Regurgitation

If this rare condition occurs, it is probably congenital. A ...

Limbs Disjointed Or Sprained

In the case of an overstretch, or sprain, which has resulted i...

Acute Dilatation Of The Heart In Acute Disease

It has for a long time been recognized that in all acute prol...

Night Pains

If these are of the nature of cramps, which come on while lyin...

Prolapsus Uteri Falling Of The Womb

Take the B D current, of good medium force, and give general ...

The Fundamental Principle

If you are a true believer in any of the above food religions...


As intimated in the preceding paragraph, the diet during end...

Where There Is A Will There Is A Way!

I have been frequently compelled to resort to these milder ap...

The Healing Influence Of Music

Dubito, an omnia, quae de incantamentis dicuntur c...


THERE are very few persons who have not I had the experience ...

The Ammonium Carbonicum

recommended by Peart, has been considered by many as a specif...

Venous Pressure

Category: Uncategorized
Source: Disturbances Of The Heart

The venous pressure, after a long neglect, is now again being
studied, and its determination is urged as of diagnostic and
prognostic significance.

Hooker [Footnote: Hooker: Am. Jour. Physiol., March, 1916.] says
there is a progressive rise of venous pressure from youth to old
age. He has described an apparatus [Footnote: Hooker: Am. Jour.
Physiol., 1914, xxxv, 73.] which allows of the reading of the blood
pressure in a vein of the hand when the arm is at absolute rest, and
best with the patient in bed and reclining at an angle of 45
degrees. He finds that just before death there is a rapid rise in
venous pressure, or a continuously high pressure above the 20 cm. of
water level, and he believes that a venous pressure continuously
above this 20 cm. of water limit which is not lowered by digitalis
or other means is serious; and that the heart cannot long stand such
a condition. These dangerous rises in venous pressure are generally
coincident with a fall of systolic arterial pressure, although there
may be no constant relation between the two. He also finds that with
an increase of venous pressure the urinary output decreases. This,
of course, shows venous stasis in the kidneys as well as a probable
lowering of arterial pressure.

Clark [Footnote: Clark, A. D.: A Study of the Diagnostic and
Prognostic Significance of Venous Pressure Observations in Cardiac
Disease, Arch. Int. Med., October, 1915, p. 587.] did not find that
venesection prevented a subsequent rapid rise in venous pressure in
dire cases. From his investigations he concludes that a venous
pressure of 20 cm. of water is a danger limit between compensation
and decompensation of the heart, and a rise above this point will
precede the clinical signs of decompensation.

Hooker also found that there are daily variations of venous pressure
from 10 to 20 cm. of water, with an average of 15 cm., while in
sleep it falls 7 or 8 cm.

It seems probable that there may be a special nervous mechanism of
the veins which may increase the blood pressure in them as
epinephrin solution may cause some constriction.

Wiggers [Footnote: Wiggers C. J.: The Supravascular Venous Pulse in
Man, THE JOURNAL. A.M.A., May 1, 1915, p. 1485.] describes a method
of taking and interpreting the supraclavicular venous pulse. He also
[Footnote: Wiggers C. J.: The Contour of the Normal Arterial Pulse,
THE JOURNAL. A.M.A., April 24, 1915, p. 1380.] carefully describes
the readings and the different phases of normal arterial pulse, and
urges that it should be remembered that "the pulse as palpated or
recorded from any artery is the variation in the arterial volume
produced by the intra-arterial pressure change at that point."

A quick method of estimating the venous pressure by lowering and
raising the arm has long been utilized. The dilatation of the veins
of the back of the hand when the hand is raised should disappear,
and they should practically collapse, in normal conditions, when the
hand is at the level of the apex of the heart. When the venous
pressure is increased, this collapse will not occur until the hand
is above the level of the heart. Oliver [Footnote: Oliver: Quart.
Med Jour., 1907, i, 59.] found that the venous pressure denoted by
the collapse of the veins may be shown approximately in millimeters
of mercury by multiplying by 2 each inch above the level of the
heart in which the veins collapse. When a normal person reclines
after standing there is a fall in venous pressure, and when he again
stands erect there is an increase in venous pressure.

Bailey [Footnote: Bailey: Am. Jour Med. Sc., May, 1911, p. 709.]
states that in interpreting pulsation in the peripheral veins, it
should not be forgotten that they may overlie pulsating arteries.
Pulsation in veins may be due also to an aneurysmal dilatation, or
to direct connection with an artery. As the etiology in many
instances of varicose veins is uncertain, he thinks that they may be
caused by incompetence of the right heart, more or less temporary
perhaps, from muscular exertion. This incompetence being frequently
repeated, peripheral veins may dilate. Moreover, the contraction of
the right heart may cause a wave in the veins of the extremities,
and he believes that incompetency of the tricuspid valve may be the
cause of varicosities in the veins of the extremities.

Next: Normal Blood Pressure For Adults

Previous: Factors Increasing The Blood Pressure

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

Viewed 1118