The nurse determines that a patient's electrocardiogram is demonstrating normal sinus rhythm.What did the nurse observe to come to this conclusion? (Select all that apply.)

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For normal sinus rhythm to be present,the heart rhythm should be regular,heart rate: 60 to 100 bpm,P waves should be rounded,upright,precede each QRS complex,and appear alike,the PR interval should be 0.12 to 0.20 seconds.C.For normal sinus rhythm the QRS interval should be less than or equal to 0.10 seconds.

The Nurse Determines That a Patient's Electrocardiogram Is Demonstrating Normal