While the american heart association (aha) suggests that meditation might be used in conjunction with more traditional treatments as a way to manage hypertension,

there is not adequate empirical support for its effectiveness.
The only thing that they could say 100% true is that during a meditation, average heart rate that people had would be lower compared to normal situation.
But there is still not enough proof to say that this activities could be considered an effective method to cure or maintain hypertension.