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Disambig Needed: Help with those issues! tvtropes.org/pmwiki/posts.php?discussion=13324299140A37493800&page=24#comment-576I believe your example sorting may have been premature, Malady. Cardiovascular Love is not a subtrope.
^^ - *sigh* I was thinking that as well... Not asking for a repair, though. ... But it is sufficiently complex to go in Trope Talk... *sigh*
^ - But it does encompass uses of Heart Symbol in love-related contexts, no? ... What is the relation, then?
Disambig Needed: Help with those issues! tvtropes.org/pmwiki/posts.php?discussion=13324299140A37493800&page=24#comment-576

Moving to Trope Talk
I just turned into it into an index of tropes that involve the symbol, and I'm not seeing any connection between the examples on the page.
It's effectively the TLP, Heart Motifs
?
- AKB0048: Every member of the AKB0048 has a heart shaped shine in their hair and in their eyes as well. This feature in particular seems to be a manifestation of the potential of a girl to be a future Successor, as it shows up the young Lancastar girls after they witness their first concert. It happens again to another set of young girls after they see their first 00 performance as well.
- Former members have diamonds instead. Justified by the fact that there are Loads And Loadsof Characters, makes it easier for people to just identify who is in and who isn't.
- In Conor Kostic's novel Saga: Ghost's symbol is a ♥, and is always represented that way. Why is it that symbol? We don't know. As she says in Saga when painting aircars:
I settled for a pale blue sky with fluffy white clouds as my background, and then filled it with floating red ♥s. Not much of a statement, I know, unless you think about how there are millions of aircars out there, and they are all a standard simple monochrome. To introduce playfulness and individuality is in itself a kind of subversion. Well, that’s if my choice needed any justification.
- Naturally, the ♥ became the band logo of Seattle-based rock group Heart, at least in their original Seventies incarnation as soft-rock country/folk band fronted by hippie chicks. The ♥ became synonymous with sisters Ann and Nancy Wilson, who fronted the group and wrote most of its material. The symbol was downgraded a little after their make-over as 1980's big-haired rock chicks performing stadium rock.
- Hello! Project loves to use these in song titles... Koisuru♡Angel♡Heart, ♡Momoiro Kataomoi♡, Icha♡Icha Summer, Honki Mekimeki♡Toki Mekimeki, Hare Ame Nochi Suki♡, Zettai Tokeru Mondai X = ♡, Renai♥Rider, Ona no Ko no Torishirabe Time♥...
- Then there's the group Odoru♡11.
- The Harts, such as Bret or Owen, typically have a heart symbol with a winged skull in the middle of it.
- Luchador ATM has two heart symbol eye holes cut into his mask.
- Just to emphasize how much of a Girly Girl she had become in Fighting Opera HUSTLE, Erica had these symbols painted on her cheeks.
- Sassy Stephie has gear with the letter S twice on her chest. One is backwards so it forms a heart.
- Shazza McKenzie has a one piece with heart symbols cut into it, bearing the sides of her midriff.
- "La Chica de la Actitud" Roxxy has her name sewn into her ring gear with the "O" being in this shape.
- Kingdom Hearts. Hearts are everywhere. They pop up in symbolism, menu icons, and whenever you kill most enemies. Hell, the freaking MOON is heart-shaped!
%%* LocoRoco: Heart symbols make numerous appearances.But, there are examples that are just mentions of the symbol, and don't have any narrative significance?
Then there's this, which is sorta like Hearts Are Health, but not.