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A 27-year-old male asked:

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

3 doctor answers • 5 doctors weighed in
Dr. Steven Ajluni
Dr. Steven Ajlunianswered
Cardiology 36 years experience
HR slightly fast : A hr of 104 at rest (sinus tach) is slightly higher than the normal range of hr's between 60-100 at rest. That said, there could be plenty of reasons that this coud happen (like anxiety, dehydration, caffeine, pain, etc). Also anemia, hyperthyroidism , breathing or pulmonary problems could result in physiologically appropriate faster hr's. Inappropriate sinus tach considered if no cause seen.
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5.2k viewsReviewed >2 years ago
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Dr. Joseph Shen
Dr. Calvin Weisberger
Dr. Joseph Shen and another doctor agree2 doctors agree
Dr. Mohamed Kanj
Dr. Mohamed Kanjanswered
cardiology - Cardiac Electrophysiology 25 years experience
Normal QT: A qt of 335 msec and a qtc of 435 msec are normal qt intervals.
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Dr. Milton Alvis, jr
Dr. Milton Alvis, jranswered
Preventive Medicine 42 years experience
QTC a bit Long ?Prob: Question reflects sophistication. Qt prolongation ↑ingly recognized as correlating with a few genetic and/or physiologic issues associated with ↑ed incidence of arrhythmias, sometimes suddenly fatal. However: underlying issues complex, qt varies with rate (reason for qtc), often difficult to read accurately & limited surface indicator. If a concern, best recheck other clues & when rate more normal.
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Last updated Jul 26, 2019

Found in:

Heart rate›Rapid heart rate›Electrocardiogram

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