You are assessing the cardiac rhythm of a 7-year-old child who says his chest is "fluttering." P waves are not visible, the QRS complexes measure 0.07 seconds in duration, the heart rate is 200 beats/min, and there is no variation in the R-R intervals when the child moves. These findings are MOST consistent with:

Correct the following transcription errors:

a. The patient was found to have nonobstructed azoospermia. b. Endometrial thickness is 13 mm trilaminar fibroid measuring 53 X 53 mm. c. Severe atheromatous plaquing of the distal aorta or bilateral iliac arteries. d. I will order non-invasive vascular studies and carotid Doppler. e. The patient's mother has no heart disease and has undergone angioplasty and stenting twice. f. Gallbladder ultrasound from All Saints Medical Center revealed cholecystolithiasis and no ductile dilatation.

Hematological analysis was performed on a 10-day-old baby who appeared to have difficulty breathing and had a temperature of 101.2 °F. The WBC was 29.8 à— 109/L. This finding represents a(n):

a. Normal leukocyte count b. Absolute leukocytosis c. Relative leukopenia d. Absolute leukopenia