12 Bilder zum Thema "qrs axis" bei ClipDealer

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In frontal lead system, anatomical transposition and electrical transposition are not in good agreement, because some electrical transposition has nothing to do with anatomy.
Sometimes, because the QRS axis is in the upper left quadrant, the high-amplitude R wave of left ventricular hypertrophy occurs in the limb leads, and left chest leads is normal.
Female, 51 years old, diagnosed with mitral stenosis. When this ECG was taken, the patient still maintained sinus rhythm.Note that the P wave duration was widened.
In the conventional 12 lead ECG, the chest lead system represents the electrical activity in the transverse or horizontal plane, and there are 6 traditional leads.
When sinus arrest occurs, the electrocardiogram will show a long P-P interval, which is not multiples of the basal sinus cycle, including physiological and pathological reasons.
Negative direction of QRS main wave in aVL lead
Female, 6 years old, clinically diagnosed with Tetralogy of Fallot. The electrocardiogram shows sinus rhythm, extreme right axis deviation, biatria abnormality, right ventricular hypertrophy, etc.
When the long axis of the heart swings up and down and left and right, it can cause a change in the polarity of the QRS main wave in the aVL and aVF leads, namely the horizontal and vertical heart.
When the frontal QRS axis is at +57, the QRS amplitude of lead is the highest.The frontal electrical axis is almost perpendicular to aVL lead, so the algebraic sum of QRS amplitude is almost zero.
According to the relationship between the long axis of the heart and the horizontal axis of the direction, the heart shadow can be divided into three types: horizontal , oblique and vertical heart.
R wave greater than S wave is judged to be positive; R smaller than S is judged to be negative; R equal to S amplitude is judged to be equipotential.
When ectopic impulses originate in the left atrium, an upright P wave will be generated in V1 and an inverted P wave in lead aVL.

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