My husband age 36 we did ecg for his past disease he got attack 2 year before did thrombosis and in ecg was printed follow hr [bpm] 66 pr interval [ms] 131 p duration [ms] 102 qrs duration [ms] 80 t duration [ms] 200 qt/qtc [ms] 366/384 p/qrs/t axis [deg] 34.9/-4.1/66.6 r (v5)/s (v1) [mv] 1.06/0.85 r (v5)+s v1 [mv] 1.90. Conclusions normal sinus rhythm middling left axis deviation I want to know what is middling left axis deviation is it serious or something to worry is ecg normal from above reading.