palpitation

US /ˌpæl.pəˈteɪ.ʃən/
UK /ˌpæl.pəˈteɪ.ʃən/
"palpitation" picture
1.

a noticeably rapid, strong, or irregular heartbeat due to agitation, exertion, or illness

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She felt a sudden palpitation in her chest after running up the stairs.
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Stress can often lead to uncomfortable palpitations.
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