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Dr. Mary Callahan

Cardiology
Sandwich, MA
30 years experience female

Locations

Cardiovascular Associates of Sandwich

Sandwich, MA

Address

68a Route 6A, Sandwich, MA
Directions

My office hours

Wednesday: Closed
Show more

Practice website

Office

Sandwich, MA

About

Bio

I grew up in MA and now live here with my family. After completing my education in New Hampshire, Maine, Rhode Island and New York, I was able to return to MA. Since returning to MA I have worked in a couple of large Cardiology groups in different locations. This past year I was finally able to open my own practice and I am looking forward to providing good medicine in a comfortable setting. Heart disease can be difficult to treat and frightening for the individual and families affected. We are trying to make it less stressful for all affected.

Specialties
Doctors may have more than one area of specialty interest. Board certification in a specialty area means the doctor has completed formal training and has practice experience in that specialty, and has passed the certification examination from the corresponding accredited medical specialty board.

Cardiology

Languages spoken

English

Doctor Q&A

374 Answers
236 Agrees
The number of answers this doctor has agreed with.
A 29-year-old member asked:
Dr. Mary Callahan
Cardiology 30 years experience
Stroke: If you mean a stroke, the exact symptoms depend on the area of the stroke. It can affect speech, memory, or muscle strength so any of these can be sy... Read More
A 31-year-old member asked:
Dr. Mary Callahan
Cardiology 30 years experience
What can be done: It sounds like your grandmother has made the decision for you. She has had a long life and she has some serious health issues. The best thing i can ... Read More
A 43-year-old female asked:
Dr. Mary Callahan
Cardiology 30 years experience
Heart rate: Your resting heart rate should ideally be between 60 to 70 beats per minute, but some individuals can go as low as 50 beats per minute.
A 58-year-old female asked:
Dr. Mary Callahan
Cardiology 30 years experience
High BP: Your BP is high and should be evaluated, but concerning that your heart rate is low, so would get seen either at a clinic or doctor's office you may ... Read More
A male asked:
Dr. Mary Callahan
Cardiology 30 years experience
Prognosis: Although your EF is still low, the prognosis depends on your medical therapy and symptoms. So if you are not having any symptoms of heart failure or ... Read More
A 37-year-old male asked:
Dr. Mary Callahan
Cardiology 30 years experience
Ignore: Eat a low sodium diet, elevate you feet when you can, and wear compression stockings when standing.
A 37-year-old male asked:
Dr. Mary Callahan
Cardiology 30 years experience
Ignore: Exercise 3 - 4 times per week for at least 30 minutes for cardiac benefit.
A 37-year-old male asked:
Dr. Mary Callahan
Cardiology 30 years experience
Ignore: Elevated your feet and eliminate sodium from your diet to lessen your swollen feet.
A 18-year-old female asked:
Dr. Mary Callahan
Cardiology 30 years experience
Chest pain: There are several possible causes of your chest pain, but first would talk with your doctor and try and treat the post nasal drip. Other possibilitie... Read More
A 45-year-old female asked:
Dr. Mary Callahan
Cardiology 30 years experience
EKG: Other than the heart rate not too bad the axis and intervals are normal.
A 20-year-old male asked:
Dr. Mary Callahan
Cardiology 30 years experience
Shortness of breath: It is unlikely that your shortness of breath is related to your mitral valve disease. Given that it occurs when you lay down at night, it may be rela... Read More
A 39-year-old female asked:
Dr. Mary Callahan
Cardiology 30 years experience
Calcium: Dairy is a good source do calcium, and even if you can't drink milk, then you can try some yogurt. It is present in some vegetables, but you would ne... Read More
A 29-year-old female asked:
Dr. Mary Callahan
Cardiology 30 years experience
Blood pressure : There are several possibilities it may be that you are taking your blood pressure too soon after eating, or after drinking coffee or tea, or other caf... Read More
A 32-year-old male asked:
Dr. Mary Callahan
Cardiology 30 years experience
Pains in chest: A upper respiratory infection can give you chest pains, especially if you are coughing. However, if you develop shortness of breath, diaphoresis or l... Read More
A 43-year-old member asked:
Dr. Mary Callahan
Cardiology 30 years experience
Cholesterol level: Your total cholesterol measures the amount of cholesterol or fat in your blood. This gives your doctors an idea of your risk for heart attacks, or s... Read More
A 36-year-old member asked:
Dr. Mary Callahan
Cardiology 30 years experience
Chest pain: If you have chest pain and have taken Nitro without any improvement then you should be seen by a physician right away. You should go to an ER for eva... Read More
A 42-year-old member asked:
Dr. Mary Callahan
Cardiology 30 years experience
Surgical pain: It depends on the type of surgery done and the approach, but the pain is likely due to the procedure itself. Since you have to breathe all the time, ... Read More
A 32-year-old female asked:
Dr. Mary Callahan
Cardiology 30 years experience
More potassium: I recommend that individuals with a low potassium take supplements and eat potassium-rich foods several times per day. Take the supplements with your... Read More
A 20-year-old female asked:
Dr. Mary Callahan
Cardiology 30 years experience
Viral syndrome: It sounds like you may be dehydrated, so would start drinking water and continue to drink more fluids. Often when you have a viral illness you don't... Read More
A 29-year-old male asked:
Dr. Mary Callahan
Cardiology 30 years experience
Pain and statins: You should not stop any medicine without consulting with your doctor. If you are having pain in your abdomen over your liver, contact your doctor and... Read More
A 55-year-old male asked:
Dr. Mary Callahan
Cardiology 30 years experience
Bilateral pain: Bilateral calf pain that is relieved by rest or walking is not usually caused by a vascular problem. More likely you should investigate a spinal or b... Read More
A female asked:
Dr. Mary Callahan
Cardiology 30 years experience
Elevated renin: Yes, at least a 24 hour urine test for metanephrines and would consider a MRI to look at her adrenal glands
A 49-year-old member asked:
Dr. Mary Callahan
Cardiology 30 years experience
Heart transplant: Likely he will be ok, but he needs to be careful about combining his cardiac meds with over the counter cold medicines. If you are concerned about co... Read More
A 41-year-old female asked:
Dr. Mary Callahan
Cardiology 30 years experience
Blood pressure: 120/80 or less is the ideal blood pressure. 130/80 is acceptable, but 140/80 or higher is hypertension. Hypertension is diagnosed with 3 or more meas... Read More
A 48-year-old female asked:
Dr. Mary Callahan
Cardiology 30 years experience
Heart fluttering: You should contact your doctor and check an EKG, you may have developed a rhythm problem with your heart. If you have any chest pain, shortness or bre... Read More
A 32-year-old member asked:
Dr. Mary Callahan
Cardiology 30 years experience
Loop diuretic: A loop diuretic is a blood pressure medicine that acts on the kidney, specifically the loop of henley to decrease fluid resorption. This results in r... Read More
A 46-year-old member asked:
Dr. Mary Callahan
Cardiology 30 years experience
Palpitations: You should tell your doctor of you are having palpitations, or if they are accompanied by lightheadedness, chest pain or shortness of breath. There a... Read More
A 31-year-old member asked:
Dr. Mary Callahan
Cardiology 30 years experience
Irregular heartbeat: There are many causes of irregular heart beats, including some medicines. This can occur because of prolongation of the qt interval, but more importa... Read More
A 32-year-old member asked:
Dr. Mary Callahan
Cardiology 30 years experience
Avoid fainting: Don't look at it. If you can't avoid looking at it then keep taking deep breaths and try to stay calm.
A 28-year-old member asked:
Dr. Mary Callahan
Cardiology 30 years experience
EF: Ef or ejection fraction is the amount of blood ejected with each beat of the heart. An ejection fraction of 55 - 60 per cent is normal. A low ef, be... Read More
A 42-year-old member asked:
Dr. Mary Callahan
Cardiology 30 years experience
GI and chest pain: Often GI problems can mimic the symptoms of heart disease. The stomach and esophagus are next to the heart so pain from either of these areas can be ... Read More
A 37-year-old member asked:
Dr. Mary Callahan
Cardiology 30 years experience
Pauses on Holter: On a Holter monitor, only pauses greater than or equal to 2.5 seconds are significant. If these are present we look for anything that can cause this ... Read More
A 31-year-old member asked:
Dr. Mary Callahan
Cardiology 30 years experience
Fasting: Likely no, fasting will not help irregular heart beats. However, staying well hydrated may help and avoiding certain things like alcohol, caffeine an... Read More
A 34-year-old member asked:
Dr. Mary Callahan
Cardiology 30 years experience
Arrhythmia: It depends is the best answer i can give now. Because some arrhythmias are relatively stable on medicines and those would be safe, however, others are... Read More
A 43-year-old member asked:
Dr. Mary Callahan
Cardiology 30 years experience
PFO: Sometimes is the best answer that i can give now. If there is significant flow across the pfo then it should be closed, or if there has been evidence... Read More
A 42-year-old member asked:
Dr. Mary Callahan
Cardiology 30 years experience
Right heart failure: The best treatment for right heart failure is to treat the underlying cause. If the right heart fails due to lung disease, then treat it, or if it is... Read More
A 34-year-old member asked:
Dr. Mary Callahan
Cardiology 30 years experience
TIA: After a TIA or mini stroke patients are hospitalized and may need to be on new medicines, so once cleared by the physicians there, then he or she shou... Read More
A 42-year-old member asked:
Dr. Mary Callahan
Cardiology 30 years experience
Exercise : The first response to exercise is to increase heart rate and then blood pressure. This is the followed by several physiologic responses such as shunt... Read More
A 33-year-old member asked:
Dr. Mary Callahan
Cardiology 30 years experience
Stent: Probably yes, after about three months the stent is covered with endothelial cells and becomes part if the vessel wall.
A 38-year-old member asked:
Dr. Mary Callahan
Cardiology 30 years experience
Fasting: Likely no, fasting will not help irregular heart beats. However, staying well hydrated may help and avoiding certain things like alcohol, caffeine an... Read More
A 39-year-old member asked:
Dr. Mary Callahan
Cardiology 30 years experience
Pacemaker and AVR: After an aortic valve replacement the pacemaker works the same way to keep the heart from going too slow. Sometimes with aortic valve disease the con... Read More
A 35-year-old member asked:
Dr. Mary Callahan
Cardiology 30 years experience
Cardiac cath: Cardiologists routinely access the arterial vessels at the top of either leg, the femoral artery, or from the arm, the radial artery. From here the c... Read More
A 39-year-old member asked:
Dr. Mary Callahan
Cardiology 30 years experience
ASD: Usually with an atrial septal defect the blood flow or shunt goes from left to right, however, in some situations when there is pulmonary hypertension... Read More
A 38-year-old member asked:
Dr. Mary Callahan
Cardiology 30 years experience
Stroke prevention: Strokes are caused by multiple factors, high blood pressure, elevated lipids, family history and even some heart problems. Risks such as blood pressu... Read More
A 46-year-old member asked:
Dr. Mary Callahan
Cardiology 30 years experience
Heart/lung transplan: Actually no, but it is important to realize that they do come with some issues. The transplant may get rid of the CF issues in those areas, but the i... Read More
A 43-year-old member asked:
Dr. Mary Callahan
Cardiology 30 years experience
Low pulse: Depends on your age and the situation, in young active people it is not uncommon. However, if the low rate is accompanied with dizziness, lightheade... Read More
A 41-year-old member asked:
Dr. Mary Callahan
Cardiology 30 years experience
Exercise and BP: You may see changes in a few weeks after starting exercise and these will continue and may increase over time, but it needs to be aerobic exercise don... Read More
A 44-year-old member asked:
Dr. Mary Callahan
Cardiology 30 years experience
Pacemaker followup: Pacemakers are followed by cardiologists in two ways--they are seen regularly in the office to adjust and check the battery. In between office visits... Read More
A 21-year-old male asked:
Dr. Mary Callahan
Cardiology 30 years experience
Rapid heart beat: There are many things that can cause you to feel dizzy, but if you are also feeling your heart beating fast then you should see your doctor. He or sh... Read More
A 42-year-old member asked:
Dr. Mary Callahan
Cardiology 30 years experience
Heart disease.: Unstable angina is usually due to a plaque rupture which limits the blood flow to an area of the heart. This is caused by increase in the size of the... Read More

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Testimonials
Recommendations and Thank you notes are endorsements given from patients or other doctors.

3
Recommendations
687
Thank you notes
HealthTap member
Mar 30, 2015
I appreciate her because she gives great hugs! #nationaldoctorsday2015 #virtualflower1
HealthTap member
Mar 30, 2015
Dr. Callahan is an amazing doctor! #nationaldoctorsday2015 #virtualflower1
HealthTap member
Mar 31, 2015
Dr. Callahan is an amazing doctor! #nationaldoctorsday2015 #virtualflower1
HealthTap member
This was very helpful. Thanks! my digoxin prescription was changed to digitek without any .explanation , I plan to have a talk with my pharmacy and explain why this can be very confusing to an 82 yea...Read More
HealthTap member
This was very helpful. Thanks! Holding off the Xarelto for now. AFIB events very sporadic and less than 30 seconds. Keeping Plavix, 81mg Aspirin, Motoprilol, BP, Levothyroxine and Atorvastatin. ...Read More
HealthTap member
This was very helpful. Thanks! Thank You. Info you provided, helped me decide on getting a 2nd Opinion. I have both-Untreated Brady & Avon plus Blood Clotting disorder. Had TIAs.

Education & Training

Medical/Graduate school

University of New England College of Osteopathic Medicine, ME
Graduated 1992MD

Awards

America's top Cardiologists 2012
Diplomate in Cardiovascular Diseases American Board of Internal Medicine
"America's Top Physicians" By Consumer Research Council of America 2013 and 2014

Affiliations

Cape Cod Healthcare
90,000 U.S. doctors in 147 specialties are here to answer your questions, provide medical advice, write prescriptions, and more.
Answer emailed
in 24 hours or less