Cardenolides are a group of chemical compounds found primarily in plants. These compounds are known for their ability to affect the human heart by binding to sodium/potassium ATPase and inhibiting its activity. They have been used traditionally in the treatment of heart failure and some forms of arrhythmia. There are several synonyms for the term cardenolides, including glycosides, digitalis, and digitalisides. These terms are often used interchangeably in scientific literature and medical texts. Other synonyms for the term cardenolides include cardiac glycosides, steroidal glycosides, and ouabain-like compounds. While these compounds can be beneficial in treating certain cardiac conditions, they can also be dangerous if not used properly, as they can lead to toxicity and other adverse effects.