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

Duhh_hh asked:

List the sequence of events that results in atrial and ventricular contraction.

Question posted courtesy of: Tammy

cafeconleche224 asked:

I went to a walk in clinic and the Dr. advised I have Premature Atrial Contractions. He also advised they are no cause for worry, however, I have been having them more frequently now and am beginning to get concerned. Any opinions?

Question posted courtesy of: Marian

Mike W asked:

I’m a 19 year old male, smoker, with blood pressure at 150/100 and weigh 135 lbs. Height is 5′11″
I had a really weird episode about 5 months back, and ever since then it’s been bugging the hell out of me. I was lying in my bed about to go to sleep, and all of a sudden I felt like I was going to vomit. The onset symptom occured within probably 5 seconds, which was strange because I have never had that before. Sure enough, I ran into the bathroom and put my head over the toilet, but didn’t throw up. I felt my chest start to pound erratically, then within the span of about 4 seconds started having ringing in my ears, saw stars, and started to drift out of consciousness, but didn’t lose consciousness. Instead, I stood up and snapped out of it, but was in Atrial Fibrillation. (not sure if it was that, but my heart was beating oddly when I felt it, but my pulse was pretty much normal. i have had EKG, holter monitor, and event monitor, but the tests were fine. What’s wrong with me?
Also, ever since this happened, I have had weird heart feelings, like my heart is jumping out of my chest randomly, and I get palpitations, but the doctor’s don’t seem concerned. My blood pressure has been at about 150/100, and it might be from anxiety. Is it all in my head because I think about it too much?
I also wanted to add that this night I had about 8 cans of mountain dew within 5 hours, but that was nothing different from what I usually drank. But now I have cut out caffeine all together, but it still doesn’t seem to have an effect.

Question posted courtesy of: Julie