Ophthalmologists can play a pivotal role in detection and treatment of life-threatening disorders by recognizing syndromes associated with retinal tumors. Ophthalmologists can play a pivotal role in detection and treatment of life-threatening disorders by recognizing syndromes associated with retinal tumors.
The P wave in the ECG represents atrial depolarization, which results in atrial contraction.
This wave is much larger than the P wave, and it represents the depolarization of the ventricles. This, in turn, stimulates contraction of the ventricles and ejection of blood from the ventricles to the large arteries leaving the heart.So you can think of the QRS wave as representing ventricular systole.his wave is much larger than the P wave, and it represents the depolarization of the ventricles. This, in turn, stimulates contraction of the ventricles and ejection of blood from the ventricles to the large arteries leaving the heart. So you can think of the QRS wave as representing ventricular systole.