dicky heart

Reader's Digest 6月号の健康に関する記事 Weird Sympoms? からの抜粋です。
A small but pleasingly eccentric 2005 study by Dr. Uwe Wollina from Dresden, Germany, came up with the eyebrow-raising finding that men with greying hair and dark eyebrows were four times more likely to have type 2 diabetes than those whose above-eye hair was grey.
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Another sign of a dicky heart is oddly, having diagonal creases in your earlobes, according to some researchers.
などなど、一見病気とは無関係な個所に変わった兆候が出るという興味深い話でした。
さて上に出てきた "dicky heart" は健康な心臓では無いことは明らかですが、"dicky" はどんな形容詞でしょうか？
・Collins Dictionary: (British, informal) in bad condition; shaky, unsteady, or unreliable ⇒ I feel a bit dicky today
・Merriam-Webster's Online Dictionary: weak, especially in health, and likely to fail or suffer from problems: Grandad's got a dicky heart.