Which pulse height is affected by inspiration?

Which pulse height is affected by inspiration?

• A. Jugular
• B. Carotid
• C. Both
• D. Neither

Answer: (A)

The jugular venous pulse height is affected by inspiration. It mirrors right atrial pressure and is sensitive to changes in intrathoracic pressure that occur with breathing. During inspiration, intrathoracic pressure becomes more negative, increasing venous return to the right heart and transiently lowering right atrial pressure. This causes the jugular venous pulse height to fall. The carotid pulse, an arterial pulse, is not typically altered by normal breathing—only in certain pathological states (like pulsus paradoxus) might arterial pulse height change with inspiration. So the pulse height influenced by inspiration is the jugular venous pulse.

The jugular venous pulse height is affected by inspiration. It mirrors right atrial pressure and is sensitive to changes in intrathoracic pressure that occur with breathing. During inspiration, intrathoracic pressure becomes more negative, increasing venous return to the right heart and transiently lowering right atrial pressure. This causes the jugular venous pulse height to fall. The carotid pulse, an arterial pulse, is not typically altered by normal breathing—only in certain pathological states (like pulsus paradoxus) might arterial pulse height change with inspiration. So the pulse height influenced by inspiration is the jugular venous pulse.