Whatever the reason that is causing you itch in your heart-I do not know.
Have you consulted with your family physician? Do that first.
After that you can practice daily : Nadi Shodhana or Anulom-Vilom Pranay
91-96. Like A Snake & Itchy Tongueby
where the clay soil has cracked open. Not so much now.
Another symptom this week was having an itchy tongue.... I've been using other free time for some home renovating/decluttering etc. I'm thinking about resuming...