-s-Naklejki In the frontal lead system, when the initial vector of the QRS wave points upward, the II, III, and aVF leads record a negative initial QRS wave, i.e., a small q wave.
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-s-Naklejki Stckler syndrome, chromosome with mutation of the COL2A1 gene.#F503500777
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-s-Naklejki Giardia is a parasitic disease caused by Giardia duodenalis. Patients have diarrhea, abdominal pain and weight loss.Magnify 1000x.
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-s-Naklejki When atrial bigeminy is not transmitted to the ventricle, it will form a special bradyarrhythmia, which is easy to be misdiagnosed as sinus bradycardia or 2:1 sinoatrial block.
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-s-Naklejki In atrioventricular block, the difference between P-P interval with QRS wave and P-P interval without QRS wave is more than 30ms, which can diagnose ventriculophasic sinus arrhythmia.
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-s-Naklejki Only one of every two impulses generated by sinoatrial node can be transmitted to atrium, resulting in sinus P wave, and the other one is blocked, which is called 2:1 sinoatrial block.
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-s-Naklejki In the general population, the distribution of normal QRS electrical axes is mostly located in the lower left quadrant, with a few located in the upper left quadrant.
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-s-Naklejki In 2009, the standardized guidelines for electrocardiograms jointly issued by AHA, ACC, and HRS standardized the interpretation criteria for frontal QRS axis.
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-s-Naklejki In the frontal lead system, when the potentials generated by ventricular excitation lack advantages and are spatially symmetrical, it is the indeterminate axis.
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-s-Naklejki When the QRS axis is located at the upper right quadrant, it can be caused by severe left or right deviation of the electrical axis.
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-s-Naklejki 90% of the atrioventricular nodal arteries originate from the right coronary artery, therefore, patients with acute inferior myocardial infarction often have various types of atrioventricular blocks.
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-s-Naklejki When the QRS waves in leads I, II, and III all show obvious S waves, or the rS wave amplitude ratio is less than 1, it is called SⅠSⅡSⅢ syndrome.
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-s-Naklejki In a 12 lead ECG, the polarity of the QRS main wave in leads I and III can be used to roughly determine whether the normal QRS axis, left axis deviation, right axis deviation and right superior axis.
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-s-Naklejki When the frontal QRS axis is located at the upper right quadrant, the QRS main wave in lead I is negative, the QRS main wave in lead III is positive or negative, and the aVF lead is negative.
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-s-Naklejki When the frontal QRS axis deviates to the right, the QRS main wave of lead I is negative, the QRS main wave of lead III is positive, and lead II can be positive or negative.
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-s-Naklejki In the general population, the posterior descending branch mainly originates from the right coronary artery, which is the dominant type of the right coronary artery and also the most common type.
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-s-Naklejki In the general population, the posterior descending branch mainly originates from the right coronary artery, which is the dominant type of the right coronary artery and also the most common type.
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-s-Naklejki When the frontal QRS axis deviates to the left, the QRS main wave of lead I is positive, and the QRS main waves of lead II and III are negative.
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