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It is best to begin with a Word search, which searches the title field of article records. A search for cardiac produces more than 800 with the word 'cardiac' in the title:
 You searched for the WORD: cardiac                      Periodical Abstracts
 854 entries found, entries 1-8 are:                 APPEARS IN          DATE
     1  Chest pain in active young people : I Physician & Sportsmedicin Jun 94
     2  Comparison of defibrillator therapy a American Journal of Cardi Jun 94
     3  Genes, hypertension, and cardiac hype New England Journal of Me Jun 94
     4  Monster problem                       American Health           Jun 94
     5  Quantitative assessment of valvular f American Journal of Cardi Jun 94
     6  Successful use of education and cost- American Journal of Cardi Jun 94
     7  The effect of transplant center volum JAMA: The Journal of the  Jun 94
     8  Atrial fibrillation : Reducing stroke Geriatrics                May 94
You can use the Limit command to add another search term, or do a new search. A search for 'cardiac fitness' produces fewer articles, one of which is:
 
 AUTHOR       Blakeslee, Sandra.
 TITLE        Kayaking in splendor for cardiac fitness.
 
 APPEARS IN   New York Times Magazine 1994, Apr 24, p. 61.
 
 SUMMARY      Sandra Blakeslee discusses the enjoyment and physical benefits of
                kayaking.
 
 SUBJECT      Kayaking.
---------- Library holdings of New York Times Magazine ----------------------
1 > Leyburn Library   NEWSPAPERS                                             
     LIB HAS: (Current issues retained until microfilm received)             
2 > Leyburn-Microfilm   NEWSPAPERS                                           
     LIB HAS: 1896-  (Stored on film with daily New York Times)              
------------------------------------------------------------------------------
Key NUMBER to see detailed holdings, OR
M > MORE BIBLIOGRAPHIC Record         N > NEW Search
R > RETURN to Browsing                A > ANOTHER Search by ARTICLE AUTHOR
F > FORWARD browse                    O > OTHER options
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W&L has holdings of the New York Times Magazine.

A search for more articles by Sandra Blakeslee turns up 15:

 You searched for the ARTICLE AUTHOR: blakeslee          Periodical Abstracts
 15 entries found, entries 1-8 are:                  APPEARS IN          DATE
 Blakeslee Sandra
     1  Kayaking in splendor for cardiac fitn New York Times Magazine   Apr 94
     2  Bald Facts About Male Self-Esteem     American Health           Sep 91
     3  The True Story Behind Breast Implants Glamour                   Aug 91
     4  Father Figures : The Male Link to Bir American Health           Apr 91
     5  A Special Report : Women & Heart Dise McCall's                  Feb 91
     6  The Lead-Calcium Time Bomb            American Health           Nov 90
     7  New Connections                       American Health           Mar 90
     8  Memories Are Made of This             New Choices for the Best  Nov 89
     9  Time Bombs of Divorce                 American Health           Jun 89
    10  The Return of the Mind                American Health           Mar 89
    11  When a Marriage Ends : How Men, Women McCall's                  Mar 89
    12  Cocaine Kindling : Wildfire in The Br American Health           Jan 89
    13  Test Device Raises Hope of Keeping Or New York Times--CEE       Jun 88
    14  Quandaries of Timing on Infant Organs New York Times--CEE       Feb 88
    15  Twisting Like an Obscene Snake        New York Times Book Revie Sep 87
The next record is for an article in a magazine which W&L does not subscribe to --there is no 'holdings' information shown:
 You searched for the ARTICLE AUTHOR: blakeslee          Periodical Abstracts
 
 AUTHOR       Blakeslee, Sandra.
 TITLE        Bald Facts About Male Self-Esteem.
 
 APPEARS IN   American Health 1991, v10n7, Sep p. 24.
 
 SUMMARY      One of the first studies to understand attitudes about balding
                men finds men who have lost their hair are considered less
                assertive, less likeable and less likely to be successful.  The
                psychological impact of balding is discussed.
 
 SUBJECT      Men.
              Hair.
              Self image.
Articles from periodicals which W&L does not carry can be ordered by InterLibrary Loan.