Abstract
Answer to Quiz Electrocardiogram on page.. and case discussionCorrect answer is B: B) Sinus rhythm with first-degree AV block (Fig. 2) On last two complexes PQRST heart rate slows down and P wave become visible.It appears from the T wave «shadow» and PQ interval can be measured.It equals 360 milliseconds.Measurement is performed in last PQRST complex in lead II.