Материал: Презентация экг инглиш

Normal sinus rhythm.

Waves P in front of each complex QRS

Normal sinus rhythm characteristics :

- HR (heart rate) equals 60-80 in min, regular rhythm (differences between minimal and maximal R-R intervals is not more than 15%); - P wave - positive in I, II, aVF, P wave – negative in aVR, PQ

≥0.12 s.

ELECTRICAL AXIS

Electric axis of the heart is a vector indicating the predominant direction of the electromotive force during ventricular depolarization.

Electric axis can coincide with the anatomical axis of the heart, and depends on the constitution and ventricular hypertrophy.

1)normal electrical axis position:α angle = +30°… +69°;

2)horizontal electrical axis position: α angle = 0°… +29°;

3)vertical electrical axis position: α angle = +70° +90°;

4)left electrical axis deviation: α angle = −

1°…−90°;

5)right electrical axis deviation: α angle = +91°…+180°.

normal electrical axis