When treating SVT, which of the following conditions suggests the patient may require adenosine or cardioversion?

In the context of treating supraventricular tachycardia (SVT), it is crucial to assess the patient’s symptoms alongside their heart rate. A symptomatic patient with a heart rate above 150 beats per minute is often at a higher risk of complications due to the rapid heart rate, which may lead to hemodynamic instability. Symptoms may include chest pain, shortness of breath, dizziness, or altered mental status, indicating that the heart rate is adversely affecting the patient's overall condition.

When a patient presents with both symptoms and a significantly high heart rate, emergency intervention with adenosine may be necessary to restore normal heart rhythm rapidly. If adenosine is ineffective or if the patient is severely symptomatic, cardioversion may be considered to achieve a more immediate conversion back to a normal cardiac rhythm, particularly in cases where the patient shows signs of distress.

Other options do not indicate the same level of urgency. A heart rate below 150 does not typically necessitate immediate drug therapy or cardioversion, especially if the patient is stable. An asymptomatic patient with a heart rate above 150 might not require urgent treatment, as they are stable despite the elevated heart rate. Age alone does not determine the need for these treatments; it is