NEW YORK ( TheStreet) -- Shares of Zoll Medical Corporation (Nasdaq: ZOLL) have taken a tremendous swing upward. The stock is trading at $61.23 as of 11 a.m. ET, 30.8% above Wednesday's closing price of $46.83. Volume is at 256,365, 0.8 times the daily average of 341,300.

Zoll Medical has a market cap of $1.04 billion and is part of the health care sector and health services industry. Shares are up 26.6% year to date as of the close of trading on Wednesday.

ZOLL Medical Corporation develops, manufactures, and markets resuscitation devices and related software solutions worldwide. The company has a P/E ratio of 33.9, equal to the average health services industry P/E ratio and above the S&P 500 P/E ratio of 17.7.

TheStreet Ratings rates Zoll Medical as a buy. The company's strengths can be seen in multiple areas, such as its robust revenue growth, largely solid financial position with reasonable debt levels by most measures, impressive record of earnings per share growth, compelling growth in net income and good cash flow from operations. Although the company may harbor some minor weaknesses, we feel they are unlikely to have a significant impact on results. You can view the full Zoll Medical Ratings Report.

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