"heart plunges" is correct and usable in written English.
You can use it to describe a sudden feeling of sadness or fear. For example, "My heart plunged when I saw my test results."
It is a moment of pure vertigo: you can feel your heart plunge into your boots.
Now that you have the non-verbal traps set, it's time to take the heart plunge and say what you mean (but only this time!).
Those changes could mean fewer heart-stopping plunges in account values — and fewer angry investors — after the next bad market.
On In for the Kill she pits her sincere falsetto around lyrics about following your heart and plunging headfirst into a love affair.
Sure enough, when a mother grabbed a pup, its heart rate plunged, vocalizations stopped, and it became passive and assumed the compact posture.
The excised heart was plunged into chilled Tyrode solution, and the aorta immediately cannulated for Langendorff perfusion with Tyrode solution (in mM: 130 NaCl, 6 KCl, 1 MgCl2, 0.5 NaH2PO4, 1.5 CaCl2, 10 Hepes, 10 glucose; pH adjusted to 7.4 by addition of Tris) vigorously gassed with 100% O2 at room temperature.
The euro slumped to as low as $1.2522 from $1.2814 late Wednesday, as the United States stock market endured a heart-stopping plunge in the middle of its trading day before retracing some lost ground.
A mother and daughter emerging from the river assured me the cold dip was "très bien!" After I took my own frigid, nearly heart-stopping plunge, I realized that they had meant it "takes your breath away but is exhilarating to survive".
But when Reba challenges her on the lack of joy in her life, she takes it so much to heart that she plunges into an impetuous affair with a hunky cop who could be trouble.
But when the FDA issued a warning following the 2007 research linking the drug with an increased risk of heart attacks, sales plunged.
