U.S. doctors online nowAsk doctors free

Dr. John Garner

Cardiology
Clearwater, FL
17 years experience male

Locations

Office

Indianapolis, IN

Address

5937 Terrytown Pkwy, Indianapolis, IN
Directions

My office hours

Tuesday: 8:00am - 6:00pm
Show more

Clearwater Cardiovascular Consultants

Clearwater, FL

About

Bio

Dr. Garner is a board certified cardiologist and specializes in heart rhythm disorders (electrophysiology). He has participated in clinical trials of next-generation atrial fibrillation ablation techniques and published on topics including ventricular tachycardia, syndromes related to sudden cardiac death, depression in cardiovascular disease, medication tolerance and adherence and has performed research in cardiac nerve activity and supraventricular tachycardias. . Dr. Garner has served as a consultant to select legal firms and helped develop the curriculum for medical school entrance test preparation for a well-known national firm. Dr. Garner sees patients with all manner of heart rhythm abnormalities throughout the Tampa and Clearwater areas of Florida out of his Clearwater office.

Specialties
Doctors may have more than one area of specialty interest. Board certification in a specialty area means the doctor has completed formal training and has practice experience in that specialty, and has passed the certification examination from the corresponding accredited medical specialty board.

Cardiology

Cardiac Electrophysiology

Internal Medicine

Languages spoken

German

Doctor Q&A

575 Answers
42 Agrees
The number of answers this doctor has agreed with.
A 41-year-old member asked:
Dr. John Garner
Cardiology 17 years experience
Not usually: Once the process starts, an ongoing phenomenon called "remodeling" tends to keep things going in the wrong direction. Good medical therapy can often (... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 23-year-old male asked:
Dr. John Garner
Cardiology 17 years experience
30-31 degrees C: After 30-31 degrees c, the body ceases efforts to warm itself up and death follows. Anything lower than 35 is considered abnormally low, and 37 is nor... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 43-year-old member asked:
Dr. John Garner
Cardiology 17 years experience
Can be: By itself, you'd probably be ok, but at 43, there's a chance of some blockage in the arteries causing chest pain or damage. These rates, by the way, a... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 33-year-old female asked:
Dr. John Garner
Cardiology 17 years experience
Generally, yes: There are two types of heart failure, systolic and diastolic. The echo alone is enough to exclude systolic failure and to make diastolic failure quit... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 48-year-old member asked:
Dr. John Garner
Cardiology 17 years experience
That you eat less: Those no carb diets all work by the same mechanism every diet on earth works by: less calories in. The key is that if you eat enough calories to gain ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 33-year-old male asked:
Dr. John Garner
Cardiology 17 years experience
The Inner One: Blood vessels run from the outside of the heart to the inside, so the area that gets hit first is what we call "endocardium" - it's the layer of heart... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 38-year-old female asked:
Dr. John Garner
Cardiology 17 years experience
By Computer?: It depends on whether a computer or a human being generated that answer. Computers are notorious for putting false readings on ecgs and they should n... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 41-year-old male asked:
Dr. John Garner
Cardiology 17 years experience
Something's Missing: You're not on nearly enough meds for someone who just got a stent. Why aren't you on prasugrel (effient), ticlopidine (ticlid), or clopidogrel (plavix... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 33-year-old member asked:
Dr. John Garner
Cardiology 17 years experience
Sure, but...: Those no carb diets all work by the same mechanism every diet on earth works by: less calories in. The key is that if you eat enough calories to gain ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 33-year-old member asked:
Dr. John Garner
Cardiology 17 years experience
If Bad Enough: The lungs have remarkable capacity to overcome problems with what we'd call "gas exchange", but if enough of the lung tissue is taken out of the pictu... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 48-year-old member asked:
Dr. John Garner
Cardiology 17 years experience
Ridiculously Low: Really really really low. < 1:2000 if you don't have particularly severe heart failure or some much more rare condition which sets you up for major c... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 39-year-old member asked:
Dr. John Garner
Cardiology 17 years experience
Compensation: In response to the low ph caused by the ketoacidosis, the brainstem triggers a dramatic increase in the respiratory rate. This causes the lungs to exp... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 45-year-old member asked:
Dr. John Garner
Cardiology 17 years experience
See an EP: See a cardiac electrophysiologist for evaluation. They'll place a monitor and see what's up. You're a bit of a ways from houston, so it might be worth... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 22-year-old male asked:
Dr. John Garner
Cardiology 17 years experience
No: A short period of rest does not cause any loss of conditioning nor any immediate decrease in stroke volume. Seeing those reverse remodels usually requ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 39-year-old member asked:
Dr. John Garner
Cardiology 17 years experience
Yes: Sodium causes water to be kept in the blood vessels, and the excess "volume" of water essentially overfills the pipes. However, then there's very comp... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 31-year-old member asked:
Dr. John Garner
Cardiology 17 years experience
Go for it: Generally speaking, if the ablation worked, it worked. Sexual activity is no better or worse than any other activity for your heart and if you go back... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 38-year-old member asked:
Dr. John Garner
Cardiology 17 years experience
Don't: Homeopathy has never been proven effective by rigorous study and dilutions below 12c don't even contain a single molecule of the substance they claim ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 41-year-old member asked:
Dr. John Garner
Cardiology 17 years experience
None anymore: In the 70s they had a plutonium powered pacemaker than ran off the heat from radioactive decay. Those are no longer made (i think it's ~3000 that wer... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 47-year-old member asked:
Dr. John Garner
Cardiology 17 years experience
Often: Electrophysiologists like myself specialize in the definitive treatment of these arrhythmias. If it is one of the 3 common types, success rates of an... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 38-year-old member asked:
Dr. John Garner
Cardiology 17 years experience
Gravity: The pulse (which i'm assuming you're taking in your wrist) is a simple mathematical formula. Pulse amplitude = systolic blood pressure - diastolic ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 53-year-old male asked:
Dr. John Garner
Cardiology 17 years experience
Hypnopompic Stimuli: It's not entirely clear what circumstances you're referring to, but there is something called hypnopompic state which is a very stimulating dream-like... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 19-year-old female asked:
Dr. John Garner
Cardiology 17 years experience
Probably not: Heart transplant requires heart/lung bypass for an extended period of time while the surgery is performed. There's limited data available but materna... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 77-year-old female asked:
Dr. John Garner
Cardiology 17 years experience
It Shouldn't Exist: The beauty of an inr is that it is independent of the specific lab and reagent used for the test. A quick test (tf plasma activation) varies within t... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 32-year-old male asked:
Dr. John Garner
Cardiology 17 years experience
Simple Enough: For the most part, your big worries are just complications of wound healing. Generally speaking, things should get slowly better every day. New redn... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 35-year-old male asked:
Dr. John Garner
Cardiology 17 years experience
Can't compare: The two drugs are of entirely different classes and the response of any given patient can vary to each class. It's not as simple as saying "you'll ge... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 35-year-old male asked:
Dr. John Garner
Cardiology 17 years experience
Not in human doses: Hydrocodone is a pain medicine - a narcotic to be specific. In any reasonable dose, there should be no arrhythmic effects. In massive overdose it ca... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A member asked:
Dr. John Garner
Cardiology 17 years experience
It depends: You are actually asking a very sophisticated question here which requires a deal of nuance. There are a couple of ways the bigeminy can arise, and a p... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 32-year-old female asked:
Dr. John Garner
Cardiology 17 years experience
Yes: There are two muscle groups running on either side of your spine in the back of your neck that cause both neckache and tension headaches. Massage the... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 49-year-old female asked:
Dr. John Garner
Cardiology 17 years experience
Need more: It sounds like you have a problem with your arteries. We wouldn't expect problems with the gastric arteries to cause headaches or dizziness. It is pos... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 40-year-old member asked:
Dr. John Garner
Cardiology 17 years experience
Rarely: Aneurysms do tend to cause occlusion by increasing turbulence promoting endothelial recruitment of platelets, but the primary concern is rupture of th... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 30-year-old member asked:
Dr. John Garner
Cardiology 17 years experience
Here you go: Blood enters through the vena cavae, passes through the right atrium into the right ventricle. The blood then goes out into the lungs and returns via ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 46-year-old member asked:
Dr. John Garner
Cardiology 17 years experience
General versus spec: Thrombosis is merely the process of a clot forming in a vessel. It can be everything from a normal process after you cut yourself to a heart attack or... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 33-year-old member asked:
Dr. John Garner
Cardiology 17 years experience
Great question: The immediate effect of ischemia is seen downstream of the vessel, but the process is a complex one. In fact, once the clot develops it promotes exten... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 56-year-old male asked:
Dr. John Garner
Cardiology 17 years experience
Best Practice: Levitra (vardenafil) is probably not the best choice to take with the Flecainide though no adverse events have been reported to my knowledge. Viagra ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 32-year-old male asked:
Dr. John Garner
Cardiology 17 years experience
Hard.. and no.: Svt is never fatal (with ultra-rare exceptions you almost certainly don't have) and is treated for symptoms. You're wise to look for someone good, but... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 28-year-old male asked:
Dr. John Garner
Cardiology 17 years experience
Large heart: This one's simple. Cardiomegaly is simply an enlarged heart. Many things can cause it and a more specific description would involve knowing a lot mo... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 69-year-old male asked:
Dr. John Garner
Cardiology 17 years experience
Probably not: There is no surgery which can correct the effects of a prior stroke.
Created for people with ongoing healthcare needs but benefits everyone.
A 19-year-old female asked:
Dr. John Garner
Cardiology 17 years experience
Unrelated: You had palpitations because you're prone to have palpitations, possibly exacerbated by some mild abnormalities in calcium, potassium or magnesium. T... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 26-year-old male asked:
Dr. John Garner
Cardiology 17 years experience
No, but: As a 26 year old, heart rates of 200 are likely entirely within the realm of possibility for you. That said, 170 is the highest you would want to see... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 33-year-old male asked:
Dr. John Garner
Cardiology 17 years experience
Because it is: When you lay down, 500-1000ml of blood volume which had previously been stored in the legs is released from the pull of gravity and can contribute to ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 31-year-old member asked:
Dr. John Garner
Cardiology 17 years experience
Love of Cancer: My answer is tongue in cheek, but only a bit so. Be very careful. Stem cell transplants are all experimental at this point and many clinical trials of... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 22-year-old male asked:
Dr. John Garner
Cardiology 17 years experience
Generally Not: Heart rate goes up in normal people by about 10 points per degree of temperature elevation, but that's "core" (internal) temperature which is extremel... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 28-year-old male asked:
Dr. John Garner
Cardiology 17 years experience
Continuous EKG: A holter monitor is a term applied to a wearable ekg system that continuously records your heart beat for 24-48 hours, enabling doctors to spot abnorm... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 23-year-old female asked:
Dr. John Garner
Cardiology 17 years experience
You need a doctor: That's a lot of things that a doctor would call "red flags." that means that some of that suggests at least the possibility of serious problems. If ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 69-year-old female asked:
Dr. John Garner
Cardiology 17 years experience
Nope: Aortic stenosis is, in simple form, limestone forming on the valve. Xarelto (rivaroxaban) is a systemic blood thinner, and while it can decrease bloo... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 45-year-old male asked:
Dr. John Garner
Cardiology 17 years experience
Yes, but...: There are medicines in the same class as sotalol like dofetilide, and they are also effective for many of the same problems, but they must be initiate... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A member asked:
Dr. John Garner
Cardiology 17 years experience
What Type?: What type of ablation was this? Generally speaking, fatigue is not a side effect of ablation procedures. Some patients expect to feel big (but unrea... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 34-year-old member asked:
Dr. John Garner
Cardiology 17 years experience
Leak Patrol: The blood vessels leak approximately 1-3% of the fluid traveling through them. The lymph system picks up that extra fluid and (with the help of the s... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 43-year-old member asked:
Dr. John Garner
Cardiology 17 years experience
A few possibilities: It is possible that your procedure was initially successful, but that the result has not been sufficiently durable. This occurs, generally, less than ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 34-year-old member asked:
Dr. John Garner
Cardiology 17 years experience
Oh yes: Defibrillators are extraordinarily effective devices for the treatment of what would otherwise be fatal lower chamber heart rhythms. That said, they m... Read More
Created for people with ongoing healthcare needs but benefits everyone.

Testimonials
Recommendations and Thank you notes are endorsements given from patients or other doctors.

6
Recommendations
1.6K
Thank you notes
Mar 9, 2014
Dr Garner has a vast fund of knowledge that allows for effectively contributing to this online community of health.
Aug 2, 2013
great answers. Very helpful!
HealthTap member
Sep 4, 2014
Awesome, caring, listens, goes to bat for his patients. Great electro physiologist!
HealthTap member
Thank you, your answer was very helpful! Learning about my atrial fib. Thank you for your info. A well informed patient is a better patient, at least with me!
HealthTap member
Thanks for your quick reply! I had a short circut burned out back on may 24 th. I am working with the same doc for more of these spells again so thank u
HealthTap member
Thank you, your answer was very helpful! I am still battling a low pt/inr even after being on enoxaparin stomach shots twice daily for 2 mos

Education & Training

Medical/Graduate school

The University of Iowa Roy J. and Lucille A. Carver College of Medicine, IA
Graduated 2005MD

Residency

UNIVERSITY OF COLORADO HOSPITAL ANSCHUTZ INPATIENT

Awards

Associate of the American College of Cardiology
Top Cardiologist , First Place, Indiana - Winter
2013
Top Doctor, First Place, Clearwater Region, FL - Summer
2013
90,000 U.S. doctors in 147 specialties are here to answer your questions, provide medical advice, write prescriptions, and more.
Answer emailed
in 24 hours or less