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An client being assessed in the emergency room is anxious about their health status. The ECG rhythm strip shows a heart rate of 120 beats/min. Characteristics of a sinus tachycardia rhythm are

A.

Atrial rhythm regular, ventricular rhythm irregular

B.

P:QRS ratio of 1:1

C.

P:QRS ratio of 2:1

D.

Ventricular and atrial rhythm are irregular

Answer and Explanation

The Correct Answer is B

A. An atrial rhythm regular and ventricular rhythm irregular would suggest an arrhythmia such as atrial fibrillation or flutter with variable conduction—not sinus tachycardia.
B. In sinus tachycardia, the rhythm is regular, the P:QRS ratio is 1:1, meaning each P wave is followed by a QRS complex, and the origin is from the sinus node.
C. A 2:1 P:QRS ratio is characteristic of certain types of heart block or atrial flutter—not sinus tachycardia.
D. Irregular ventricular and atrial rhythms are seen in atrial fibrillation or other irregular arrhythmias, not sinus tachycardia.
 


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Related Questions

Correct Answer is B

Explanation

A. Spinal cord perfusion is not monitored with a pulmonary artery catheter; it typically requires different neuromonitoring techniques.
B. Hemodynamic status is accurately monitored using a pulmonary artery catheter (also called a Swan-Ganz catheter), which provides information on cardiac output, pulmonary artery pressures, and other cardiovascular parameters.
C. Intracranial pressure is monitored using devices like an intraventricular catheter or subarachnoid bolt, not a pulmonary artery catheter.
D. Renal function is assessed through laboratory tests (e.g., BUN, creatinine) and urine output, not via a pulmonary artery catheter

Correct Answer is B

Explanation

A. An atrial rhythm regular and ventricular rhythm irregular would suggest an arrhythmia such as atrial fibrillation or flutter with variable conduction—not sinus tachycardia.
B. In sinus tachycardia, the rhythm is regular, the P:QRS ratio is 1:1, meaning each P wave is followed by a QRS complex, and the origin is from the sinus node.
C. A 2:1 P:QRS ratio is characteristic of certain types of heart block or atrial flutter—not sinus tachycardia.
D. Irregular ventricular and atrial rhythms are seen in atrial fibrillation or other irregular arrhythmias, not sinus tachycardia.

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