Dr. John Calhoon, MD is a cardiothoracic surgeon in San Antonio, TX specializing in cardiothoracic surgery and general practice. He graduated from Baylor College of Medicine in 1981 and has 44 years of experience. Dr. John Calhoon, MD is affiliated with University Hospital, University Health and UT Health San Antonio.
4502 MEDICAL DRIVE
San Antonio, TX 78229
8300 Floyd Curl Drive 3rd Floor
San Antonio, TX 78229
Heart Attack
A heart attack is a serious medical event that happens when the blood supplying oxygen to the heart is cut off, usually because of a blockage in an artery. This results in damage or death of part of the heart muscle. The heart can heal, but like any part of the body that was injured it leaves a scar. This scar tissue does not contract effectively, so the ability of the heart to pump is lowered after a heart attack.
A heart attack, sometimes called a myocardial infarction, can happen without warning. However there are certain factors that raise the risk of heart attack. Some of these are:
Heart attacks typically feel like pain or pressure in the chest that can radiate out to the back, arm, or jaw. Some other symptoms can include fatigue or weakness, shortness of breath, sweating, and nausea.
Treatment aims to increase blood flow to the heart muscle by opening up blocked blood vessels. Medications are sometimes used to dissolve clots in the arteries. Aspirin and other medications such as Plavix can thin the blood and make clots less likely to form. Dilators can widen blood vessels to make room for more blood to flow. Doctors can also use a procedure called catheterization to look at the blood vessels around the heart directly, place stents, or widen vessels using angioplasty. In extreme cases bypass surgery can be used to help blood flow better. After recovery, it is important to lead a healthy lifestyle and take any prescribed medications in order to protect the heart.
Heart Problems
The heart is one of the most important organs in the body. This smooth muscle expands and contracts rhythmically an entire lifetime, pumping blood to the lungs and then to every other cell in the body. When heart problems occur, it becomes difficult for the body to get the nutrients and oxygen it needs via the blood. So while there are a variety of illnesses and disorders that affect the heart, most of them cause weakness, exhaustion and shortness of breath. The most common heart conditions include heart disease, angina, arrhythmia, and valve disorders.
Heart disease is the leading cause of death in the United States for both men and women. This includes coronary artery disease, heart attacks, congestive heart failure, and congenital heart disease. Some conditions, such as genetics, cannot be controlled. But there are many other things one can do to lower their risk for heart disease. Controlling high blood pressure and cholesterol levels, reducing or stopping smoking, exercising more and losing weight if needed, and eating a diet low in sodium can all protect the heart.
Angina is a squeezing type of chest pain that happens when the muscles around the heart don't get enough oxygen. It can be regular or infrequent. Usually, angina is caused by coronary heart disease. However, not all chest pain is angina. Chest pain can also be caused by a lung infection or panic attack, for example, so it is important to have any sudden pain checked.
Arrhythmia is the word for when the heart beats too fast, too slow, or irregularly with skipped beats. It can feel frightening, and depending on the type it can be dangerous, but in most cases arrhythmia is not serious and can be treated. It is very common, especially in older adults.
Heart valve problems can happen in any one of the the heart's four valves that keep blood flowing where it needs to go. Babies can be born with problems in their heart valves, or valves can be damaged by infections. The valves can stiffen and become less mobile, or they can stop closing properly and 'leak' when the heart beats. Valve problems can usually be repaired surgically.
Lung Issues
Every cell in the body requires oxygen to function and produces carbon dioxide as a waste product. In order to keep the body's tissues constantly supplied with fresh oxygen and to keep waste from building up, the lungs pump air in and out, even while sleeping or unaware. Unfortunately, diseases and disorders affecting the lungs are some of the most common medical problems afflicting people around the world. Some of the most common lung problems include asthma, COPD, pneumonia, and lung cancer.
Asthma is a chronic disease where swollen, inflamed airways make it hard to breathe. It is often brought on by specific triggers. While asthma is a common condition, affecting millions of people, it can also be serious and even fatal in severe cases. Treatment involves avoiding triggers and using inhaled corticosteroid medications.
COPD, or Chronic Obstructive Pulmonary Disease, is the name given to two illnesses that both cause difficulty breathing: emphysema and chronic bronchitis. In emphysema, the air sacs of the lungs become damaged, while with bronchitis they become clogged with mucus. COPD is the fourth leading cause of death in the United States. It is almost always caused by breathing irritants into the lungs, such as smoking or heavy pollution.
Pneumonia is a lung infection that can be caused by bacteria, a virus, or fungi. Most healthy people recover from pneumonia in a week or two, but for some people pneumonia can be fatal. There are treatments available for pneumonia, but the best treatment is to prevent getting sick in the first place. People who are at risk should make sure they get a flu shot every year. There is also a vaccine available for the type of bacteria that causes pneumonia.
Lung cancer occurs when abnormal cells inside the lung grow into a tumor, destroying healthy tissue. Because it is so difficult to detect lung cancer in early stages when it has few symptoms, it is the deadliest form of cancer, responsible for the most cancer deaths both in the U.S. and worldwide. Most lung cancer is caused by exposure to tobacco smoke, but between 10-15% of cases are not linked to smoking.
Some problems with the lungs are minor and are not cause for concern. However if symptoms have lasted for a month or more, even if they are minor, it is worth checking with a healthcare professional. A cough, shortness of breath, or excess mucus production that lingers for weeks are all worth getting looked at.
Dr. John Calhoon, MD graduated from Baylor College of Medicine in 1981. He completed residency at University of Texas Health Science Center. He is certified by the American Board of Thoracic Surgery and has a state license in Texas.
Medical School: Baylor College of Medicine (1981)
Residency: University of Texas Health Science Center (1986)
Board Certification: American Board of Thoracic Surgery
Licensed In: Texas
Dr. John Calhoon, MD is associated with these hospitals and organizations:
Dr. John Calhoon, MD appears to accept the following insurance providers: Superior Health Plan, BlueCross BlueShield of Texas, Humana PPO, Coventry HMO, Private Healthcare Systems (PHCS), Prime Health, Medicare Advantage, MultiPlan, Coventry PPO, Coventry Workers' Compensation, Three Rivers, Humana HMO, Aetna, United Healthcare, Medicaid, Humana, Molina Healthcare, HealthSmart, Aetna EPO, First Health, Aetna PPO, WellPoint, Aetna HMO, Oscar - Commercial Exchange, Interlink - Transplant, Point Comfort Underwriters (PCU) - Refugee Medical Assistance, Provider Network of America (PNOA) - Commercial, Insurance Accepted, OptumHealth - Transplant ONLY, Scott & White Health Plan - HMO, Gonzaba Medical Group - Transplant ONLY, Universal Benefits Consortium - Brokerage Firm (School Districts), University of Incarnate Word (Gilsbar) - Direct Employer, Scott & White Health Plan - PPO, Tokio Marine - Transplant, 90 Degree Benefits - Commercial, 6 Degrees - Transplant, LifeTrac - Transplant, Point Comfort Underwriters (PCU) - Unaccompanied Children, Ancira Enterprises - Direct Employer, Velocity National Provider Network - Wrap Network, Independent Medical Systems (IMS) - PPO, Entrust - TPA, EBSO - TPA and Velocity National Provider Network - Commercial PPO.
According to our sources, Dr. John Calhoon, MD accepts the following insurance providers:
Dr. John Calhoon, MD has an exceptional overall rating with an average of 4.9 out of 5 stars based on 23 ratings. We collect ratings and reviews of Dr. John Calhoon, MD from all over the web to help you find the right in San Antonio, TX.
These charts describe general payments received by Dr. John Calhoon, MD. Doctors may receive payments for a number of reasons, including meal compensation, travel compensation, and consulting.
Medtronic, Inc. |
$1,786
Octopus $111 |
$1,675 |
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Medtronic Vascular, Inc. |
$729
Heart Valves $312 |
CoreValve Evolut $191 |
Reveal LINQ $67 |
Aortic Stent Grafts $66 |
Endurant $41 |
Other $52 |
Abbott Laboratories |
$377
Mitra Clip system $232 |
AMPLATZER Occluders $145 |
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St. Jude Medical, Inc. |
$331
Structural Heart $291 |
Ensite $39 |
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Edwards Lifesciences Corporation |
$297
Edwards SAPIEN XT Transcatheter Heart Valve $30 |
$267 |
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Other |
$625
HeartWare Ventricular Assist System $147 |
Virtuosaph $115 |
Cardiovascular $115 |
Tissue Heart Valves $68 |
Da Vinci Surgical System $36 |
Other $143 |
Food and Beverage | $2,453 |
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Grant | $1,675 |
Travel and Lodging | $17 |
Dr. John Calhoon's area of specialization is cardiothoracic surgery. His education and training includes medical school at Baylor College of Medicine and residency at a hospital affiliated with the University of Texas Health Science Center at San Antonio. Dr. Calhoon's areas of expertise include aortic valve regurgitation, pulmonary valve disease, and heart tumor. Patient reviews placed him at an average of 5.0 stars (out of 5). He most likely takes Aetna EPO, Blue California, and HealthSmart, as well as other insurance carriers. Dr. Calhoon speaks Spanish. He is affiliated with the University Health, the University Hospital, and UT Health San Antonio. UT Health San Antonio reports that he is accepting new patients at his office in San Antonio, TX.