X0304 4/A 2011-11-18 2011-11-22 0000764579 CAS MEDICAL SYSTEMS INC CASM 0001310306 PATTON THOMAS M C/O CAS MEDICAL SYSTEMS, INC. 44 EAST INDUSTRIAL ROAD BRANFORD CT 06405 1 1 0 0 PRESIDENT & CEO Common Stock 2011-11-21 4 P 0 10526 1.749 A 503545 D Share amount of 14,426 originally reported is being corrected hereby. The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $1.59 to $1.78, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this footnote (2). /s/Thomas M. Patton 2012-02-13