This mudra shown here ..was amongst the first one I learnt. Its also called hridaya mudra, amritsanjeevani mudra. These names suggest the significance of this mudra.
It is believed regular practice of this can even help avert a heart attack. It can make the heart strong. And control heart problems
And only recently I learnt that this can even help in emotional problems, specifically dealing with heart-related ones.
For real impact u need to hold the mudra at least for 30 minutes. U can manage this by using it while meditating or doing pranayama. Or even while watching TV.
If u have high blood pressure, çirculatory problems, heart-related issues or a broken heart ...this is the mudra for u.