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Home > TX Providers > Cardiac Electrophysiologists

Dr. John Charles Isaac, MD

(John Isacc, MD)

(4 Ratings)

Specializes in: Cardiac Electrophysiology (Heart Rhythm), General Surgery, Cardiology (Heart Disease), Interventional Cardiology and Vascular Medicine (Blood Vessel Disease)

University of Texas Southwestern Medical School (1994)

Professional interests include: hypertension (high blood pressure), high cholesterol (hyperlipidemia), angiogram (angiography), and more.

7010 Champions Plaza Drive Suite 200
Houston, TX 77069

(713) 791-1978

Dr. John Charles Isaac, MD is a cardiac electrophysiologist in Houston, TX specializing in cardiac electrophysiology (heart rhythm), general surgery, cardiology (heart disease), interventional cardiology and vascular medicine (blood vessel disease). He graduated from University of Texas Southwestern Medical School in 1994 and has 30 years of experience. Dr. John Charles Isaac, MD is affiliated with Houston Methodist, WILLOWBROOK CARDIOVASCULAR ASSOCIATES, P.A. and HOUSTON CARDIOVASCULAR ASSOC INC.

Office Locations

Address:

7010 Champions Plaza Drive Suite 200
Houston, TX 77069

Address:

6560 Fannin Street Suite 620
Houston, TX 77030

Some issues Dr. John Charles Isaac, MD can help you with:

Angioplasty

Angioplasty is a common, minimally invasive procedure performed to restore blood flow in arteries and veins that have become narrowed or blocked. Age or illness can cause plaque to build up at certain spots within the veins and arteries, and if enough collects, it can restrict the flow of blood. Angioplasty uses a tiny balloon at the end of a small, flexible tube to inflate within the narrowed section and open it up again.

Angioplasty may be performed in several different areas of the body and for a variety of reasons, most often:

Peripheral arterial disease, which reduces blood flow in the arms or legs
Atherosclerosis, or general hardening of the arteries
Carotid artery stenosis, or narrowing of the arteries in the neck that supply the brain
Coronary artery disease, or narrowing of the arteries near the heart
Renal vascular hypertension, or narrowing of the arteries in the kidney, leading to increased blood pressure

During angioplasty, a patient is given a sedative while lying on a table under an x-ray machine. A catheter (a thin, flexible, and hollow tube) is inserted into the patient's skin in the arm or groin and guided into the blocked artery. Dye is injected via the catheter, and x-rays are used to position the tip of the catheter exactly at the blockage. The tiny balloon is guided through the catheter and inflated with saline. It pushes the plaque out of the way, squishing it against the walls of the artery. The balloon may be inflated and deflated several times to let blood pass by. A stent, a tiny tube of metal mesh like a spring, may be inserted to help keep the artery open. Then the x-ray is used again to check that blood is flowing properly, the catheter is removed, and the tiny incision is bandaged.

There are no nerves within veins and arteries, so an angioplasty is generally not painful. However, there may be some discomfort at the site of the incision and when the balloon is inflated. Overall, angioplasty is a very effective and low-risk procedure, useful for helping patients avoid more difficult bypass surgery.

Coronary Artery Disease

Coronary artery disease (CAD) is the most common type of heart disease. It happens when the blood vessels carrying blood to the heart, called coronary arteries, narrow and harden. This occurs when cholesterol, a type of fat found in the blood, builds up to form plaque, which sticks to the inner walls of the arteries. As plaque accumulates, less blood can flow through the arteries, which may lead to the following:

Angina, which is chest pain that occurs when the heart does not receive enough blood flow.
Heart attack, which happens if the arteries leading to the heart are completely blocked.
Arrhythmia, or irregular heartbeat, which can develop if the heart does not have enough blood supply.
Heart failure, which may occur if a heart attack damages the heart and it becomes too weak to pump enough blood to the rest of the body.

Certain factors may increase risk for the disease, like smoking, lack of exercise, being overweight, high cholesterol, high blood pressure, and diabetes. CAD tends to develop over decades, so it can go undetected until it has become quite severe. A diagnosis may be established using such tests as:

Electrocardiogram (ECG), which records the heart's electrical activity over a period of time. ECGs can detect whether there is enough blood flow to the heart or if a heart attack has occurred.
Echocardiogram (echo), which creates images of the heart using sound waves. Echos can show whether the heart is able to pump blood normally.
Stress tests, where an ECG or echo is combined with exercise, like riding a stationary bike or walking on a treadmill. This test is done to find out if the heart can function properly while performing a strenuous activity.

Treatments for the disease include medications such as vasodilators, like nitroglycerin, which dilates (widens) the coronary arteries. CAD may also be treated by a procedure called angioplasty with stent placement, where a balloon is inflated inside a diseased artery to flatten the plaque deposits against the artery walls, creating more room for blood to flow.

In some severe cases of the disease, multiple arteries may be blocked, and an open heart surgery called coronary artery bypass surgery may be necessary. This operation transplants a vessel from another part of the body to form a graft that goes past the narrowed arteries, thus enabling blood to flow around those arteries.

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.

In The News

“"Treating heart disease and stroke is a partnership and each individual's doctor and health care team will develop a treatment plan that's right for that patient," said cardiologist Dr. John Isaac,...”—"Recognize Red Flags for Your Heart Health", Perryville Republic Monitor, March 2022

ambulatory monitoring	74
cardiac procedures	1498
cardioversion	12
catheterization	17
diagnostic procedures	20
doctor visit	2272
hospital care	463
inpatient care	450
lab tests	580
minimally invasive procedures	16
nuclear scan	449
outpatient care	13
stress testing	888
ultrasound (sonogram)	955
vascular procedures	474

**Gender**
Male	452
Female	512

**Ethnicity**
Non-Hispanic White	824
Black	81
Hispanic	44
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	448
From 75 to 84	313
85 and over	158
Less than 65	45

Hypertension	75
High Cholesterol	75
Stroke	9
Ischemic Heart Disease	68
Depression	17
Chronic Kidney Disease	31
Asthma	8
Osteoperosis	9
Atrial Fibrilation	24
Heart Failure	31
Chronic Obstructive Pulmonary Disease	18
Diabetes	39
Dementia	14
Cancer	12

ambulatory monitoring	71
cardiac procedures	1593
catheterization	21
diagnostic procedures	24
doctor visit	2275
hospital care	532
inpatient care	520
lab tests	478
minimally invasive procedures	20
nuclear scan	462
outpatient care	12
stress testing	929
ultrasound (sonogram)	1053
vascular procedures	520

**Gender**
Male	471
Female	552

**Ethnicity**
Non-Hispanic White	873
Black	79
Hispanic	43
Asian	15
Other	13
Native American	0

**Age**
From 65 to 74	495
From 75 to 84	341
85 and over	147
Less than 65	40

Hypertension	75
High Cholesterol	75
Stroke	11
Ischemic Heart Disease	67
Depression	19
Chronic Kidney Disease	29
Asthma	8
Osteoperosis	9
Atrial Fibrilation	22
Heart Failure	30
Chronic Obstructive Pulmonary Disease	17
Diabetes	35
Dementia	13
Cancer	13

ambulatory monitoring	56
angioplasty	28
cardiac procedures	1668
catheterization	63
diagnostic procedures	21
doctor visit	2232
hospital care	302
inpatient care	303
lab tests	411
minimally invasive procedures	62
nuclear scan	487
stent placement (stenting)	28
stress testing	975
ultrasound (sonogram)	1054
vascular procedures	521

**Gender**
Male	988
Female	1012

**Ethnicity**
Non-Hispanic White	1722
Black	118
Hispanic	98
Asian	34
Other	0
Native American	0

**Age**
From 65 to 74	970
From 75 to 84	674
85 and over	280
Less than 65	76

Hypertension	75
High Cholesterol	75
Stroke	9
Ischemic Heart Disease	64
Depression	15
Chronic Kidney Disease	28
Asthma	11
Osteoperosis	8
Atrial Fibrilation	22
Heart Failure	27
Chronic Obstructive Pulmonary Disease	14
Diabetes	32
Dementia	11
Cancer	11

ambulatory monitoring	62
cardiac procedures	1718
catheterization	14
diagnostic procedures	17
doctor visit	2327
hospital care	248
inpatient care	249
lab tests	276
minimally invasive procedures	13
nuclear scan	520
stress testing	1031
ultrasound (sonogram)	1184
vascular procedures	608

**Gender**
Male	480
Female	522

**Ethnicity**
Non-Hispanic White	869
Black	60
Hispanic	42
Asian	16
Other	15
Native American	0

**Age**
From 65 to 74	493
From 75 to 84	352
85 and over	129
Less than 65	28

Hypertension	75
High Cholesterol	75
Stroke	8
Ischemic Heart Disease	75
Depression	14
Chronic Kidney Disease	35
Asthma	17
Osteoperosis	7
Atrial Fibrilation	22
Heart Failure	25
Chronic Obstructive Pulmonary Disease	14
Diabetes	34
Dementia	10
Cancer	13

angioplasty	34
cardiac procedures	1630
cardioversion	12
catheterization	83
diagnostic procedures	32
doctor visit	2199
hospital care	249
inpatient care	250
lab tests	200
minimally invasive procedures	82
nuclear scan	495
stent placement (stenting)	34
stress testing	989
ultrasound (sonogram)	1111
vascular procedures	612

**Gender**
Male	498
Female	501

**Ethnicity**
Non-Hispanic White	882
Black	49
Hispanic	42
Asian	12
Other	14
Native American	0

**Age**
From 65 to 74	472
From 75 to 84	367
85 and over	136
Less than 65	24

Hypertension	75
High Cholesterol	75
Stroke	8
Ischemic Heart Disease	75
Depression	14
Chronic Kidney Disease	38
Asthma	7
Osteoperosis	9
Atrial Fibrilation	23
Heart Failure	27
Chronic Obstructive Pulmonary Disease	16
Diabetes	34
Dementia	12
Cancer	14

ambulatory monitoring	12
cardiac procedures	1693
cardioversion	12
catheterization	27
diagnostic procedures	30
doctor visit	2176
electroencephalography (EEG)	135
hospital care	381
implant surgery	17
inpatient care	382
lab tests	195
minimally invasive procedures	44
nuclear scan	528
stress testing	1056
ultrasound (sonogram)	1129
vascular procedures	605

**Gender**
Male	513
Female	552

**Ethnicity**
Non-Hispanic White	931
Black	52
Hispanic	50
Asian	19
Other	0
Native American	0

**Age**
From 65 to 74	494
From 75 to 84	402
85 and over	141
Less than 65	28

Hypertension	75
High Cholesterol	75
Stroke	9
Ischemic Heart Disease	75
Depression	19
Chronic Kidney Disease	38
Asthma	8
Osteoperosis	8
Atrial Fibrilation	25
Heart Failure	27
Chronic Obstructive Pulmonary Disease	16
Diabetes	34
Dementia	12
Cancer	16

airway management	37
angioplasty	26
cardiac procedures	1877
catheterization	72
diagnostic procedures	33
doctor visit	2365
electroencephalography (EEG)	250
hospital care	412
inpatient care	413
lab tests	168
minimally invasive procedures	71
nuclear scan	575
stent placement (stenting)	26
stress testing	1150
ultrasound (sonogram)	1308
vascular procedures	682

**Gender**
Male	540
Female	583

**Ethnicity**
Non-Hispanic White	970
Black	62
Hispanic	52
Asian	19
Other	20
Native American	0

**Age**
From 65 to 74	528
From 75 to 84	412
85 and over	157
Less than 65	26

Hypertension	75
High Cholesterol	75
Stroke	7
Ischemic Heart Disease	75
Depression	19
Chronic Kidney Disease	39
Asthma	9
Osteoperosis	10
Atrial Fibrilation	25
Heart Failure	26
Chronic Obstructive Pulmonary Disease	17
Diabetes	33
Dementia	13
Cancer	16

airway management	29
cardiac procedures	1595
catheterization	19
diagnostic procedures	22
doctor visit	2507
hospital care	274
inpatient care	275
lab tests	141
minimally invasive procedures	18
nuclear scan	383
stress testing	935
ultrasound (sonogram)	1276
vascular procedures	653

**Gender**
Male	547
Female	582

**Ethnicity**
Non-Hispanic White	972
Black	62
Hispanic	50
Asian	18
Other	27
Native American	0

**Age**
From 65 to 74	554
From 75 to 84	402
85 and over	151
Less than 65	22

Hypertension	75
High Cholesterol	75
Stroke	8
Ischemic Heart Disease	75
Depression	19
Chronic Kidney Disease	36
Asthma	7
Osteoperosis	10
Atrial Fibrilation	23
Heart Failure	23
Chronic Obstructive Pulmonary Disease	12
Diabetes	32
Dementia	11
Cancer	16

airway management	14
angioplasty	62
cardiac procedures	2820
cardioversion	15
catheterization	149
diagnostic procedures	56
doctor visit	4870
hospital care	708
inpatient care	709
lab tests	103
minimally invasive procedures	148
nuclear scan	290
stent placement (stenting)	62
stress testing	1383
ultrasound (sonogram)	2613
vascular procedures	1377

Average Medicare Procedure Volume From 2013 - 2021

Volume of procedures performed by Dr. John Charles Isaac, MD for Medicare patients.

The highest averages for the top procedures that Dr. John Charles Isaac, MD treated as a cardiac electrophysiologist in Houston, TX were cardiac procedures, ultrasound (sonogram), stress testing and vascular procedures.

airway management	26
ambulatory monitoring	56
angioplasty	37
cardiac procedures	1792
cardioversion	12
catheterization	53
diagnostic procedures	28
doctor visit	2582
electroencephalography (EEG)	192
hospital care	397
implant surgery	17
inpatient care	394
lab tests	283
minimally invasive procedures	55
nuclear scan	465
outpatient care	12
stent placement (stenting)	37
stress testing	1037
ultrasound (sonogram)	1299
vascular procedures	674

Average Medicare Patient Data From 2013 - 2021

Information about Medicare patients treated by Dr. John Charles Isaac, MD.

**Gender**
Male	448
Female	481

**Ethnicity**
Black / African American	56
Asian / Pacific Islander	13
Non-Hispanic White	804
Native American / Alaskan Native	0
Hispanic	42
Other	8

**Age**
75 to 84	326
85 and over	129
Less than 65	28
65 to 74	445

Average of Total of Conditions of Medicare patients treated by Dr. John Charles Isaac, MD From 2013 - 2021

The highest averages of the most common conditions of Medicare patients that Dr. John Charles Isaac, MD treated were high cholesterol, hypertension, ischemic heart disease and chronic kidney disease.

Hypertension	60
High Cholesterol	60
Stroke	6
Ischemic Heart Disease	57
Depression	13
Chronic Kidney Disease	27
Asthma	7
Osteoporosis	7
Heart Failure	21
Chronic Obstructive Pulmonary Disease	12
Diabetes	27
Atrial Fibrillation	18
Cancer	11
Dementia	9

Education & Training

Dr. John Charles Isaac, MD graduated from University of Texas Southwestern Medical School in 1994. He completed residency at Johns Hopkins University Affiliated Hospitals. He has a state license in Texas.

Medical School: University of Texas Southwestern Medical School (1994)

Residency: Johns Hopkins University Affiliated Hospitals (1997)

Licensed In: Texas

Affiliations & Hospitals

Dr. John Charles Isaac, MD is associated with these hospitals and organizations:

Houston Methodist

WILLOWBROOK CARDIOVASCULAR ASSOCIATES, P.A.

HOUSTON CARDIOVASCULAR ASSOC INC

Ratings & Reviews

Dr. John Charles Isaac, MD has a high overall rating with an average of 4.0 out of 5 stars based on 4 ratings. We collect ratings and reviews of Dr. John Charles Isaac, MD from all over the web to help you find the right in Houston, TX.

Overall Rating

(4 Ratings)

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General Payments

These charts describe general payments received by Dr. John Charles Isaac, MD. Doctors may receive payments for a number of reasons, including meal compensation, travel compensation, and consulting.

**Payments by Company**
AstraZeneca Pharmaceuticals LP	$537,820 BRILINTA $423,341	FARXIGA $102,687	BREZTRI $2,685	AIRSUPRA $1,595	CRESTOR $100	Other $7,412
Amgen Inc.	$329,530 Repatha $273,699	Corlanor $55,725	XGEVA $11	$95
Esperion Therapeutics, Inc.	$305,073 NEXLETOL $289,879	NEXLIZET $15,194
SANOFI-AVENTIS U.S. LLC	$273,129 PRALUENT $251,319	MULTAQ $7,077	DISEASE STATE $3,949	NO PRODUCT DISCUSSED $3,505	$7,278
Janssen Pharmaceuticals, Inc	$263,733 XARELTO $263,694	INVOKANA $14	Xarelto AF $6	$19
Other	$1,052,453 JARDIANCE $220,265	ELIQUIS $209,911	Vascepa $134,671	ENTRESTO $94,547	PRALUENT ALIROCUMAB INJECTION $91,212	Other $301,848

**Types of Payments**
Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program	$2,237,153
Travel and Lodging	$276,384
Consulting Fee	$113,759
Food and Beverage	$109,536
Honoraria	$24,500
Other	$407

Biography

Dr. John Isaac is a specialist in general surgery, interventional cardiology, and cardiac electrophysiology (heart rhythm). Dr. Isaac graduated from the University of Texas Southwestern Medical School. He has a 4.0 out of 5 star average patient rating. He is professionally affiliated with Houston Methodist.