Atrial Contractions

yummymummy asked:

Does anyone know what kind of pressure changes would occur on the “cardiac cylce diagram” if the patient had a pacemaker? i know what the normal CCD looks like, but I can’t figure out how a pacemaker would change it. This question has nothing to do with EKG findings, just ventrical/atrial pressure changes.

Question posted courtesy of: Jill

Cody L asked:

a. 0.4 sec
b. 0.3 sec
c.0.1 sec
d 0.8 sec

___ The length of the normal cardiac cycle
___ The quiescent period, or pause
___ Time interval of atrial sysyole
____Ventricular Contraction Period

Thanks!!
10 pts best answer

Question posted courtesy of: Michele

Krissers asked:

Which of the following evens would cause a decrease in mean arterial blood pressure?
A. and increase in ADH production
B. release of atrial natriuretic factor
C.constriction of blood vessels in the skin
D. activation of the renin-angiotensin mechanism
E. an increase in aldosterone production

Which of the following statements regarding regulation of local blood flow is true?
A. increased metabolic rate in a tissue increases capiallary blood flow into the tissue
B. Blood flow throug capillaries is continous
C. Contraction of precapillary sphincters will increase blood flow to a capillary bed.
D. Increased levels of CO2 increase the contraction of precapillary sphincters
E. Tissue need for oxygen and amino acids will cause precapillary sphincters.
Thanks

Question posted courtesy of: Lillian

Greg R asked:

The atrial contraction produces a simple signal (the P-wave).
What does each part of the QRS represent ?

I am an Anatomy & Physiology instructor.

Question posted courtesy of: Ryan

Lyndee asked:

I’ve always had tooth decay since I was old enough to have teeth. Now that I am 41 yrs. old my heart specialist told me that I have PAC (premature atrial contraction) and mitral valve leakage. Upon examining my teeth, which I’ve had a few pulled and the others are rotting he said this is why you have heart problems. What does bad teeth and heart problems have in common?

Question posted courtesy of: Edith

Jasmine asked:

Sinus rhythm - left atrial abnormality on an EKG……

Can someone please explain what the heck that could possibly mean? In an easy to understand manner?
Could it just be a mitral valve showing up?

Question posted courtesy of: Irene

greeneyesmon asked:

i recently had an EKG that showed “nornal sinus rythem” “a left atrial enlargement” “borderline ECG” then it said “inconclusive” my doc is sending me for a echocardiagram..what would cause a left atrial enalrgement..i am a young women..40yrs old..just had full blood work done that came back fine..extremely worried…..

Question posted courtesy of: Clyde