How can supraventricular tachycardia affect you?

SVT: Palpitations, dizziness, chest pain, possibly black out are all possible symptoms.

Ineffective hrt beat: If your heart is beating extremely fast (as in supra-ventricular tachycardia) it has very little time to fill with blood between beats so very little blood will be pumped with every beat. As a result important organs like your brain, kidneys, liver and your heart itself will not receive the necessary amount of blood to continue functioning properly.