What could be considered a warning sign to initiate immediate treatment in SVT patients?

In the context of supraventricular tachycardia (SVT), low blood pressure in the patient is indeed a significant warning sign that requires immediate treatment. When a patient experiences SVT, especially if it's persistent or sustained, one of the potential complications is a decrease in cardiac output. This can lead to hypotension, which is an important indicator of inadequate perfusion and can result in end-organ damage if not addressed promptly.

Low blood pressure in this setting suggests that the heart may not be effectively pumping blood to meet the body's demands. This situation can escalate quickly, making it critical to initiate treatment such as pharmacological interventions or electrical cardioversion to restore a normal heart rhythm and stabilize the patient's hemodynamics.

While dizziness can also be a concerning symptom, it is somewhat subjective and can vary among patients. Monitoring the patient's blood pressure provides an objective measure of their cardiovascular status. Hence, the presence of low blood pressure carries a more direct implication for the need for urgent intervention in the management of SVT.