Electrocardiography, a Rare card

The card carries these facts from its Wikipedia article.

• It is an electrogram of the heart which is a graph of voltage versus time of the electrical activity of the heart using electrodes placed on the skin.
• These electrodes detect the small electrical changes that are a consequence of cardiac muscle depolarization followed by repolarization during each cardiac cycle.
• Changes in the normal ECG pattern occur in numerous cardiac abnormalities, including: Cardiac rhythm disturbances, such as atrial fibrillation and ventricular tachycardia Inadequate coronary artery blood flow, such as myocardial ischemia and myocardial infarction electrolyte disturbances, such as hypokalemia Traditionally, "ECG" refers to a 12-lead ECG taken while lying down as discussed below.

Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The Electrocardiography article was read about 360,000 times in a year. ATK comes from the length of the article and DEF from its quality, so this card hits with 85 and blocks with 88: each hit it takes is cut by 35 %.

Open packs. Each pack holds five cards drawn from real Wikipedia articles, the rarest last, and the fifth card is always Rare or better. The odds are shown in the game. A free pack arrives every hour and two can wait, and the Coins you win in duels buy more packs.

The cards just above and just below Electrocardiography in the power ranking, all domains together.