How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask petdrz. Your Own Question
petdrz., Dog Veterinarian
Category: Dog
Satisfied Customers: 7232
Experience:  Over 30 years of experience in caring for dogs and cats.
Type Your Dog Question Here...
petdrz. is online now
A new question is answered every 9 seconds

I have a 6 1/2 yr old female schnauzer. She fainted last week

This answer was rated:

I have a 6 1/2 yr old female schnauzer. She fainted last week and has never done this before. Took her to the vet who said her iron was low. Kept her a couple of days and ran a test to see if it was Addison's disease. The test came back negative. I went to pick her up, she fainted again. The vet then thought she may have Sick Sinus Syndrome. She has fainted approx 10 times in 5 days. An ECG & an xray was performed of her heart and both were fine. No murmurs or enlargement. Sunday(yesterday) she has not had any more fainting spells and is starting to eat a little. Can you please advise what I need to do for her? My next option has been advised of the possiblity of a pace maker? Today(Monday) she is doing okay. I just do not know what steps to take next. I am worried sick!
Hello and thanks for trusting me to help you and Gracie today. I'm a veterinarian with over 25 years experience and would be happy to work with you but need a bit more information in order to better assist you if you don't mind.

Why is Gracie taking the antibiotics and steroids?

Did she have other bloodwork run besides the iron? Was everything else normal?

Did she have any symptoms leading up to the fainting?

Thanks and I will respond further after you reply. There may be a slight delay while I formulate and type a thorough response.

Customer: replied 3 years ago.

She is taking antibiotics as a prevention as the vet did not know. Her sodium and cortisol was low. That is why the vet put her on the steriods. Blood tests were run on everything from what I know and all came back okay. A different test was run to see if she had Addison's but it came back negative. She threw up once last Sunday and was very low key and did not want to leave our side on Monday, but we did not really think much of it at the time. Tuesday was when she begain the fainting.

Thank you for the reply.

It sounds as if your vet is doing a very good workup and ruling out the most common castes for a young dog such as this to develop these type of symptoms so acutely. I am glad to hear that the fainting episodes have ceased at least for now.

Her symptoms are suspicious of Addison's disease, but if the test that was run was an ACTH test (which I am assuming it was), it is hard to get a false positive. Most dogs that present in an Addisonian crisis, do not faint and then get better, only to faint again and again over the next few days.

Based on her breed and the symptoms, sick sinus syndrome is more likely. A random strip on the EKG may not pick it up and the abnormalities seen may be more intermittent in which case a holter monitor that measures the rhythm over 24 hours may give a better picture as to what is occurring. There is also a test where a drug called atropine is given and the effect on the heart rhythm is monitored. This can be used a means of confirming the diagnosis. Sometimes these can be managed medically, and maybe that is why she seems improved now, but some dogs do progress to the point that a pacemaker is needed to better manage the rhythm abnormalities. In any case, it would be a good idea to work with a veterinary cardiologist at this time to get a specialist's input to more thoroughly diagnose and offer treatment suggestions. Here is a link with more information about sick sinus syndrome and it's treatment. LINK HERE

I hope this is helpful. My goal is to provide you with excellent service – if you feel you have received anything less, please reply back with additional questions or concerns and I will be happy to continue. Kindly rate me when you are done. Thank you for allowing me to assist you.

Dr Z

petdrz., Dog Veterinarian
Category: Dog
Satisfied Customers: 7232
Experience: Over 30 years of experience in caring for dogs and cats.
petdrz. and other Dog Specialists are ready to help you
Thank you kindly for the positive rating. It is truly appreciated.

Good luck with Gracie. Please keep me updated as to how things are progressing for her. I will check back with you in a few days to see how she is doing.

Dr Z
Hello Jennifer,

Just wondering how things are going with Gracie. Has she had anymore fainting spells.

Please let me know if you have any further questions or concerns that I can address.

Dr Z

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

  • You are a light at the end of scary tunnel when $ are tight, but people need professional help to turn to for help with their dear pets! Linh Charleston, WV
< Previous | Next >
  • You are a light at the end of scary tunnel when $ are tight, but people need professional help to turn to for help with their dear pets! Linh Charleston, WV
  • $1,000 spent at his vet, and I finally get the correct diagnosis from Nancy Holmes for $15 Carol Cedar Hill, MO
  • I think this is the greatest web site in the world. Thanks to all! Judy New Haven, CT
  • I have referred several friends to your web site. I'm impressed with how easy it is to use your site, the Experts available and the quickness of answers. Nina USA
  • I am completely pleased with the quick response that I received in our time of need for our dog, Jasmine. I couldn't believe how quick the response was and I thank you. It's good to know you're there!! Jasmine's Mom USA
  • Please let everyone involved with your site know that your Expert, Dr. Lucy, has saved my dog's life. I will recommend your site to all my pet loving friends. Thank you again for simply being there! Sonya G Easley, SC
  • Last night my Expert spent close to 3 hours working with me on my dog's illness. Thank you so much for this opportunity to share in her care and knowledge! Cathie M Pompano Beach, FL

Meet The Experts:

  • Dr. Gary

    Dr. Gary

    Dog Veterinarian

    Satisfied Customers:

    DVM, Emergency Veterinarian; BS (Physiology) Michigan State Univ
< Last | Next >
  • Dr. Gary's Avatar

    Dr. Gary

    Dog Veterinarian

    Satisfied Customers:

    DVM, Emergency Veterinarian; BS (Physiology) Michigan State Univ
  • Joan's Avatar


    Vet Tech

    Satisfied Customers:

    Vet Tech for over 35+ years working w/Dogs/Rescues
  • Candy's Avatar


    Veterinary Technician

    Satisfied Customers:

    Practicing Veterinary Technician for 26 years.Former Veterinary Practice Owner, Technician Trainer
  • Dr. Andy's Avatar

    Dr. Andy

    Medical Director

    Satisfied Customers:

    UC Davis Graduate, Interests: Dermatology, Internal Medicine, Pain Management
  • Theresa's Avatar


    A Voice for Your Pet

    Satisfied Customers:

    19+ years experience in small animal medicine
  • 's Avatar

    Satisfied Customers:

  • Dr. Drew's Avatar

    Dr. Drew


    Satisfied Customers:

    Small Animal Medicine and Surgery