A 39-year-old member asked:
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Can you tell me if on an ecg, what does a "persistent s-wave ( v5-v6 )" and mean?

1 doctor answer
Dr. Stanley Berger
32 years experience in Cardiology
Depends: A small S wave in these leads is usually normal. A prominent S-wave may be seen in patients with right sided overload conditions, such as pulmonary disease. A large S wave in V1 and lead I when the QRS is wide is seen in right bundle branch block (RBBB). In rare cases, a person with dextrocardia may be diagnosed by ECG with one feature being a persistent s-wave in V5-V6. Review with your doctor.
Answered on Dec 31, 2016
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