Question

which rhythm is characterized by the classic \sawtooth\ pattern, causes a loss of atrial kick and causes a decrease in cardiac output. sinus bradycardia atrial flutter sinus tachycardia ventricular fibrillation

Explanation:

Atrial Flutter shows a classic "Sawtooth" pattern on ECG. It leads to loss of atrial kick (as atrial contraction is abnormal) and can decrease cardiac output (due to less effective filling and pumping). Sinus bradycardia has slow but regular sinus rhythm. Sinus tachycardia has fast regular sinus rhythm. Ventricular fibrillation has chaotic electrical activity with no coordinated contraction (no "Sawtooth" like pattern as in atrial flutter).

Answer:

B. Atrial Flutter