Junctional Rhythms and Cardiac Output

The video tutorial explains the role of the SA and AV nodes in heart rhythms, focusing on junctional rhythms where the AV node acts as the main pacemaker. It covers the causes, symptoms, and EKG interpretation of junctional rhythms, highlighting the impact of low oxygen and certain drugs. The tutorial also outlines nursing interventions and treatments, including the use of atropine and pacemakers.

What is the primary role of the AV node in the heart?

• To regulate blood pressure

• To pump blood to the lungs

• To act as a backup pacemaker

• To initiate the heartbeat

What is the typical heart rate range for a junctional escape rhythm?

• 20 to 40 beats per minute

• 40 to 60 beats per minute

• 60 to 80 beats per minute

• 80 to 100 beats per minute

What happens to the P waves in a junctional escape rhythm?

• They are exaggerated

• They are absent or inverted

• They are doubled

• They are normal

Which of the following is NOT a cause of junctional rhythms?

• Certain medications

• Heart inflammation

• Low oxygen levels

• High blood pressure

Which condition is NOT associated with causing junctional rhythms?

• Sepsis

• Lyme disease

• Myocarditis

• Hypertension

What does the 'C' in the acronym 'COLLAPSED' stand for?

• Cold sweats

• Chest pain

• Confusion

• Cough

What is the medical term for difficulty breathing, as mentioned in the symptoms of low cardiac output?

• Dyspnea

• Apnea

• Bradypnea

• Tachypnea

Which of the following is a symptom of low cardiac output?

• Hyperactivity

• Lethargy

• Weight gain

• Increased appetite

Which medication is used to increase heart rate in junctional escape rhythms?

• Beta blockers

• Digoxin

• Atropine

• Calcium channel blockers

What is the effect of vagal maneuvers on heart rate?

• Decrease heart rate

• Increase heart rate

• No effect on heart rate

• Irregular heart rate