How to Crochet an Anatomical Heart
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This free anatomical heart crochet pattern is the perfect thing to give to your cardiologist, surgeon, or heart loving friend. Have a doctor in the family? They would love a crocheted piece to display in their office, I’m sure! Let’s crochet an anatomical heart using this free crochet pattern today.
Anatomical Heart Crochet Pattern
The reason for the HEART in Heart Hook Home is that my oldest son, Caden, has a rare and severe congenital heart defect (CHD). He has been through many procedures and open heart surgeries, with another coming in April of 2026. Follow along with that journey as I update along the way! ♥
I decided to make his surgeon a crocheted heart to place in his office as a “thank you” for all of the wonderful work he has done to improve the quality of Caden’s life and the length of it. I hope that whomever you crochet this anatomical heart for appreciates it and loves it as much as I enjoyed creating it.
From my sister, the anatomy professor:
The human heart is a muscular organ about the size of a fist, located behind the sternum and ribs. The heart has four chambers – two atria up top, and two ventricles below. Large vessels allow for blood to move into and out of the heart. The aorta, the largest blood vessel, emerges from the top of the heart and carries oxygen rich blood to the body. Blood depleted of oxygen blood returns to the heart through the largest veins in the body – the superior and inferior vena cavae. Inside the heart, valves act like tiny one way doors, keeping blood flowing in the right direction with each beat. Even though it’s often symbolized in simple shapes, the real heart is a beautifully complex structure—perfect inspiration for a detailed crochet creation!
Thank you, Meadow!
For this pattern we are using My Ami yarn from Herrschners. This is a great yarn for amigurumi – and it’s literally in the name! This yarn has excellent stitch definition and consistency, meaning smooth and clean looking amigurumi. They also have some amazing colors, and the best “red” and “sapphire” for the heart. Perfect!
I’ve included the main structures of the heart – from the Aorta to the Pulmonary Artery to the Superior Vena Cava. If you want to get super fancy, you could add some blue veins with yarn, embroidery floss, or thread.
Now let’s make an anatomical crocheted heart!
Grab the ad-free, printable version of this pattern on Ravelry, Etsy, or right here in the Heart Hook Home Blog Shop. Thank you! If you need help reading a crochet pattern, make sure you head over here and check out this detailed post.
Materials:
My Ami yarn (55% Acrylic/45% Cotton)
-approx. 90 yards Red
-approx. 30 yards Sapphire (Blue)
Crochet hook in size G/4mm
Sewing pins for pinning parts into place before sewing
Gauge: unimportant
Pattern Notes:
Pattern written using US terms.
Use the Invisible Decrease for decreasing. (Tutorial here)
Magic Circle (tutorial here)
Do not join at any point throughout the pattern, work in a spiral marking the first stitch of each round with a stitch marker.
Abbreviations:
Ch(s): Chains
Sc: Single Crochet
Sl st: Slip stitch
St(s): Stitches
Main Body:
Using red yarn…
Round 1: Magic circle, 7sc in circle. (7)
Round 2: 2sc in each st around. (14)
Round 3: sc in each st around. (14)
Round 4: * sc in next st, 2sc in next st * repeat between * * around. (21)
Round 5: sc in each st around (21)
Round 6: * sc in next 2 sts, 2sc in next st * repeat between * * around. (28)
Round 7: sc in each st around. (28)
Round 8: * sc in next 3 sts, 2sc in next st * repeat between * * around. (35)
Round 9: sc in each st around. (35)
Round 10: * sc in next 4 sts, 2sc in next st * repeat between * * around. (42)
Round 11: sc in each st around. (42)
Round 12: * sc in next 5 sts, 2sc in next st * repeat between * * around. (49)
Round 13 through 21: sc in each st around. (49)
Round 22: * sc in next 5 sts, sc2tog * repeat between * * around. (42)
Round 23: sc in each st around. (42)
Round 24: * sc in next 4 sts, sc2tog * repeat between * * around. (35)
Round 25: sc in each st around. (35)
Round 26: * sc in next 3 sts, sc2tog * repeat between * * around. (28)
*begin filling with fiberfill and add as needed for remainder.
Round 27: * sc in next 2 sts, sc2tog * repeat between * * around. (21)
Round 28: * sc in next st, sc2tog * repeat between * * around. (14)
Round 29: sc2tog around. (7)
Fasten off and weave in all ends.
Superior Vena Cava:
Using the blue yarn, the crocheted Superior Vena Cava is just one part…
Round 1: Leaving plenty of yarn for sewing, Ch-12, sc in 2nd ch from hook and in each ch to end. Do not join, but work in a spiral throughout. (11)
Rounds 2 through 8: sc in each st around. (11)
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Sl st to next st. Fasten off and set aside.
Pulmonary Artery:
Using the blue yarn, the crocheted Pulmonary Artery consists of two tubes connected at the bottom….
Round 1: Leaving plenty of yarn for sewing, Ch-13, sc in 2nd ch from hook and in each ch to end. Do not join, but work in a spiral throughout. (12)
Round 2: sc in each st around. (12)
Round 3: 3sc in next st, sc in 5 sts, 3sc in next st, sc in 5 sts (16)
Round 4: sc in next, 3sc in next, sc in 7 sts, 3sc in next, sc in 6 sts. (20)
Round 5: sc in 3 sts, ch-2, sk-10 sts and sc in 7 sts. (12)
Rounds 6 through 10: sc in each st around. (12)
Sl st to next st and fasten off.
Attach in the first missed stitch from round 5 (see photo)…
Round 6: sc in each of the 10 skipped sts, sc in each of the two chains. (12)
Rounds 7 through 15: sc in each st around. (12)
Sl st to next st. Fasten off and set aside.
Aorta:
Using the red yarn, the crocheted Aorta has four parts: one long tube with three smaller tubes across the top of it…
Main portion:
Round 1: Leaving plenty of yarn for sewing, Ch-12, sc in 2nd ch from hook and in each ch to end. Do not join, but work in a spiral throughout. (11)
Rounds 2 through 30: sc in each st around. (11)
Sl st to next st. Fasten off leaving plenty of yarn for sewing and set aside.
Make one:
Round 1: Leaving plenty of yarn for sewing, Ch-9, sc in 2nd ch from hook and in each ch to end. Do not join, but work in a spiral throughout. (8)
Rounds 2 through 4: sc in each st around. (8)
Sl st to next st. Fasten off and set aside.
Make one:
Round 1: Leaving plenty of yarn for sewing, Ch-9, sc in 2nd ch from hook and in each ch to end. Do not join, but work in a spiral throughout. (8)
Rounds 2 through 5: sc in each st around. (8)
Sl st to next st. Fasten off and set aside.
Make one:
Round 1: Leaving plenty of yarn for sewing, Ch-9, sc in 2nd ch from hook and in each ch to end. Do not join, but work in a spiral throughout. (8)
Rounds 2 through 6: sc in each st around. (8)
Sl st to next st. Fasten off and set aside.
Pulmonary Veins:
Using the red yarn…
Make four:
Round 1: Leaving plenty of yarn for sewing, Ch-9, sc in 2nd ch from hook and in each ch to end. Do not join, but work in a spiral throughout. (8)
Rounds 2 through 3: sc in each st around. (8)
Sl st to next st. Fasten off and set aside.
Parts & Construction:
Aorta – Sew the three smaller tubes to the top of the longer tube, as pictured, with the shortest tube on one end and the longest on the other.
Superior Vena Cava – one piece
Pulmonary Artery – one piece, two tubes
Pulmonary Veins – four individual tubes, two on each side.
Pin the Pulmonary Artery (PA) to the side of the heart, with the bottom of it lined up to round 21 of the heart body.
Fold the Pulmonary Artery across the top of the heart body as pictured above and position the Aorta perpendicular to it and on top of it as pictured below.
Place both ends of the Aorta around round 20 of the heart body as pictured, with the shortest tube positioned closer to the Pulmonary Artery.
Position the Superior Vena Cava opposite of the Pulmonary Artery, around round 21 of the body.
Position two Pulmonary Veins on each side of the heart vertically, near the base of the Aorta.
Using the yarn tails, sew the pieces securely into place. When sufficiently sewn on, feed the yarn through the bottom of the heart and clip your yarn. You are finished!
I can’t wait to see yours! Be sure to tag @HeartHookHome across all social media, or share in the Heart Hook Home Crochet Community on Facebook.
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