The information on vitamin K content in foods is limited to less than two hundred foods. Sorry, but I don't have any additional information about various lettuce values other than the ones I posted below. If he were to eat lettuce, I would stick to Butterhead as it is the lowest in the table I have.

Would suggest he try salads made of other raw vegetables and fruits that are lower sources of vitamin K like cabbage, beans, cucumbers, carrots, etc.

I have a provisional table (not reviewed by other researchers yet) of vitamin K values (micrograms per 100 gram serving) which you can also get from the USDA. I have selected foods people usually consume (excluding spices and herbs which are used in very small amounts) and are high in Vitamin K. Remember that these values are per 3 1/2 ounce serving, which may be rather large for some foods (nuts) while, appropriate for others (vegetables). The Recommended Dietary Allowances for Vitamin K for adult males is 80 mcg and for adult females 65 mcg. The following list of foods are from highest to lowest food sources, grouped in ranges of values as follows:

830 - 800 mcg Swiss Chard Kale 540 - 500 Mcg Parsley 440 - 400 Mcg Brussel Sprouts Spinach 380 - 300 Mcg Purslane 270 - 200 Mcg Broccoli Turnip Greens Watercress Endive Lettuce Leaves Spring Onions 170 - 100 Mcg Mustard Greens Cabbage Lettuce, Butterhead Pistachio Nuts Coleslaw

50 - 10 mcg Soybeans Beans, Snap Cabbage, Red Avocados Asparagus Soybeans, Dry Roasted Peas Pickles, Dill Kiwifruit Sauerkraut Pea Pods Abalone Lentils Kidney Beans Cucumber Carrots Peppers, Sweet Pumpkin Leeks Artichoke Celery Plums

10 - 1 mcg Tomato Sauce, Canned Tomatoes Lima Beans Blueberries Meatloaf Mackerel Cowpeas (Black Eyed Peas) Apricots French Fries Tomato Juice Sweet Potatoes Potatoes Spaghetti Sauce Cheddar Cheese Grapes Squash Oatmeal, Instant Bread Peaches Beets Soy Milk Tofu Egg Yolk Chili Con Carne Bran Flakes Puffed Wheat Onions Navy Beans Saltine Crackers Cranberry Sauce White Rice Parsnips Sour Cream Pretzels Cantaloupe Melon

Coumadin is prescribed to prevent blood clots and thins the blood to flow more easily through narrowed blood vessels. You should have a consistent intake of vitamin K (Recommended Dietary Allowances for adults is men is 80 mcg and women 65 mcg per day) yet avoid Vitamin K supplements. Vitamin K improves blood clotting. Foods high in Vitamin K are: green leafy vegetables (spinach, kale), liver and is produced by bacteria in your intestines. But, milk, meat, eggs, cereal, fruits and vegetables contain small amounts. Vitamin K content of food is not known with a degree of accuracy to be listed on food labels. Vitamin supplements containing Vitamin K are only available by prescription.

Foods to avoid are green and herbal tea, fish oil supplements (high in vitamin A), meat tenderizer containing papain, soybean oil and fried or boiled onions. Also, large amounts of Vitamin A, E, K and C supplements will alter your prothrombin (blood clotting) time, which will be tested frequently by your doctor. You should also avoid alcohol and limit caffeine-containing foods (coffee, tea, cola beverages and chocolate) while on coumadin.

You did not say what type of cardiac diet you are on. Are you on a low saturated fat , low fat/ calorie reduced diet? Please write back.