"I will run the way of Thy commandments, when Thou shalt enlarge my heart." (Psalm 119:32)
Leading up to the heart
The opposite, in fact. The coarctation of the aorta--the valve leading out of the heart--is when the artery is constricted and does not allow blood to flow as it should. It's congenital, meaning one is born with it. Doesn't mean God can't fix it and thank God for medical science.
I have a confession to make. Going through my parents' divorce, I waxed a tinge disdainful (litotes!) of "the health care profession". I can say this and admit it because I've gotten over it. Growing up and from my perspective, I suppose a cavalier one, having been healed of God-knows-what at birth by God-knows-how, I never felt any irrational fear for my health or that I could look to that (modern medicine) as anything to fall back on. Now. Reason I grew the attitude I did after the divorce was because I felt abandoned by my mother--herself, a nurse. And so leveled this wrongheaded (and hearted) opinion at those entering and exiting (for work) the hospital up the street from where we lived. The attitude has come full circle in the ensuing days from the divorce as I (and my brother) have seen my father through three major hospital visits in five years. This is what I mean when I say "thank God for medical science". Because there's no doubt that He uses it. And no doubt that there are absolutely wonderful people--angels, really--who wear scrubs and lab coats and give of their time and their life and their knowledge. Forgive me the disdain. Forgiveness is the key to God enlarging your heart should you find restriction in your outflow. Like a spiritual coarctation. But we have been "born again".
"Being born again, not of corruptible seed, but of incorruptible, by the word of God, which liveth and abideth for ever." (1 Peter 1:23)
Just a quick thought, but do you think every time Peter heard the rooster crow in the morning, he was reminded of his betrayal of Jesus? Maybe for a time. But God is not one to beat you over the head for things you've done wrong. Peter was at Jesus' side. Called to help Him as far as he did and he did the best he could. The thing about us as humans is God will let us go as far as we can in our own strength before we fall down. A sad correlation to coarctation is the lower half of the body is affected as such. Blood flow to the lower extremities is limited and may well cause problems later in life. Again, thank God for healing in whatever form it takes (because I know God heals supernaturally). But as His child, you know you're heart is just like His right? The body will follow suit.
"Their line is gone out through all the earth, and their words to the end of the world. In them hath He set a tabernacle for the sun." (Psalm 19:4)