cardiac_百度百科
Physical and eye examinations, with special attention to cardiac and blood-pressure problems, should be performed annually to rule out serious medical conditions.

Heart - Wikipedia
Cardiac muscle tissue has autorhythmicity, the unique ability to initiate a cardiac action potential at a fixed rate—spreading the impulse rapidly from cell to cell to trigger the contraction of the entire heart.

CARDIAC中文 (简体)翻译：剑桥词典 - Cambridge Dictionary
He is credited as the father of cardiac surgery. Researchers have found that the leading cause of sudden cardiac death was a coronary artery problem. Hawthorn extracts have been shown to have some cardiac benefit. Complications of anemia include hypoxia and cardiac problems like cardiac failure.

心臟 - 维基百科，自由的百科全书
心臟 （英語： heart），簡稱 心，是動物 循環系統 中推動 血管 内 血液 的 肌造 器官 [1]。 脊椎动物 的心脏位于 体腔 前部、 消化管 腹侧、 围心腔 中，為由特殊结构与功能的肌肉、纤维组织构成的中空肌性器官；人體心臟則位於 胸部 縱膈腔 的中間偏左手側 [2]。 人類、其他 哺乳類 、 鸟類 的心臟可分為四個 腔室：左右 心房 （上半部）、左右 心室 （下半部） [3][4]。 通常右心室以及右心房會被合稱為右心，而左心房與左心室則被合稱為左心 [5]，兩者又合稱為心臟。 另一方面， 魚類 則有兩個腔室 [註 1]；而 兩棲類 、 爬蟲類 則有三個腔室 [4]。 健康的心臟會透過 心瓣 使血液維持單一方向的流動，並藉此避免發生 回流 的問題 [2]。

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Heart | Structure, Function, Diagram, Anatomy, & Facts | Britannica
This process is called the cardiac cycle. The period of relaxation is called diastole. The period of contraction is called systole. Diastole is the longer of the two phases so that the heart can rest between contractions. In general, the rate of heartbeat varies inversely with the size of the animal.

Cardiac Research
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Heart: Anatomy & Function - Cleveland Clinic
Electrical impulses make your heart beat, moving blood through these chambers. Your brain and nervous system direct your heart’s function. What is the function of the heart? Your heart’s main function is to move blood throughout your body. Blood brings oxygen and nutrients to your cells.