HealthTap Online Primary Care Doctors Accepting New Patients
Book a video visit
HealthTap
Telehealth
A member asked:

My qtc was 390 at heart rate 60 then i got my heart rate to 98 a few moments later and qtc was 464! so i have long qt or i dont have long qt?

A doctor has provided 1 answer

Qtc: Are you measuring your heart rate and qtc intervals on a legitimate EKG machine? The normal change with faster heart rates is shortening of the qt interval. A cardiologist with electrophysiology subspecialty is best to answer your question.or evaluate you.

Answered 3/14/2020

93 views

Thank

Related Questions

A member asked:

Is this normal qt interval 335 and qtc 435 and heart rate 104? Ecg showed sinus tachycardia,

5 doctors weighed in across 3 answers

A member asked:

Is it true that it takes 1-2 minutes for the qt interval to adapt to a new heart rate? ime if resting heart rate is 60 supine qtc 395 and you stand up the instant tachycardia would show a false prolonged qtc as it hasn't had time to adapt fully?

A doctor has provided 1 answer

A member asked:

I went into to a pre-op appointment. Had a heart rate of 147. They did EKG that says sinus Tachycardia and borderline ST elevation, Anterior leads. HR-147 PR-120 QRSD- 72 QT-251 QTc-393 they made it seem like a big worry but didnt tell me what to do?

A doctor has provided 1 answer

A member asked:

On my ecg my heart rate speed up from 74 to 94 so it has two different rates. Does this mean the Automated qt and qtc will be incorrect? Due to my sinus arrhythmia.

A doctor has provided 1 answer

A member asked:

On clarithromycin. I do not have Long QT. Is the drug above associated with heart rhythm problems purely because it increases QTC?

5 doctors weighed in across 2 answers

Sponsored Content
HealthTap Medical Group does not endorse products or services. Sponsored content revenues support our mission to make health information free and accessible to all.Learn more

People also searched for:

Using Bazett formula when my heart rate is 98 my QT is 350 and QTC 447. But when my heart rate is 60 It is 398. Why is it 447 at higher rate?
My son's ECG report showed 93 heart rate per minute, pr 144ms , qrs 82 , s p-r-t 57 12 18. But the qt/qtc is 366/455.Borderline. I am scared .Please rep?
Heart Rate 96 QRS Interval 82 ms QT Interval 364 ms QTC Interval 460 ms P Axis 61 deg QRS Axis 21 deg T Wave Axis 7 deg P-R Interval 184 msec
What is the qt and qtc for heart rate 106?
My resting heart rate is 48 and 40 while I sleep. Is it still safe to take Azithromycin? My Qt is 455ms and QTC is 405ms at heart rate 48?

Telemedicine

Primary Care
Manage Your Conditions
Women's Health
Children's Health
Men's Health
Senior Health
Wellness, Prevention & Lifestyle
Sexual Health
Mental & Behavioral Health
Travel Medicine
Urgent Care
Ask your question
Didn't find what you're looking for?

90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more.

Ask your question

More of what we treat

Allergies
Antibiotics
Asthma
High Blood Pressure
Prescriptions
Type 2 Diabetes
Content on HealthTap (including answers) should not be used for medical advice, diagnosis, or treatment, and interactions on HealthTap do not create a doctor-patient relationship. Never disregard or delay professional medical advice in person because of anything on HealthTap. Call your doctor or 911 if you think you may have a medical emergency.
HealthTap
HIPAA logo
HIPAASecure
Soc 2 Type 2 logo
SOC 2 Type 2Certified
JCAHO Accredited
JCAHOAccredited
Member App

Download HealthTap

Video visit and message your doctor

Member App QR Code
Play Store Member LinkApp Store Member Link

Questions?

+1 (888) 828-0841support@healthtap.com
LinkedInTwitter
HomeTermsPrivacyCookiesDMCAHealth TopicsDoctors DirectoryDoctor Q&A by Specialty
Copyright 2026 HealthTap, Inc.