Locations
Office
Baltimore, MD
About
Bio
I am a graduate of Duke University and of the University of Maryland Medical School. I completed a residency in internal medicine and a fellowship in cardiology at the University of Maryland School of Medicine.
I am also proficient in the field of hypnosis.
SpecialtiesDoctors 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.
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
Internal Medicine
Licenses
United States: Maryland
Doctor Q&A
528 Answers
100 Agrees
The number of answers this doctor has agreed with.
A 43-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 56 years experience
No: Zetia (ezetimibe) is not a statin. Although it lowers the cholesterol, there is no proof that it prevents bad outcomes.
5.6k viewsReviewed >2 years ago
A 29-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 56 years experience
The heart muscle: The heart is a muscle and it is the contraction of that muscle which propels the blood.
5.7k viewsReviewed >2 years ago
A 53-year-old female asked:
Dr. Louis Grenzeranswered
Cardiology 56 years experience
Hypnosis: I don't know why you are doing that but it really does not matter. It probably would be cured by hypnosis. I can do that over the internet or in my of... Read More
2.7k viewsAnswered >2 years ago
A male asked:
Dr. Louis Grenzeranswered
Cardiology 56 years experience
Not: That would be a nuisance but not dangerous. There are medications and procedures which could help to control it. It would be helpful to see the EKG du... Read More
2.7k viewsReviewed >2 years ago
A 53-year-old female asked:
Dr. Louis Grenzeranswered
Cardiology 56 years experience
Sometimes painful: If the tumor has spread to the chest wall or diaphragm it can be painful but pain is not usual
814 viewsAnswered >2 years ago
A 25-year-old male asked:
Dr. Louis Grenzeranswered
Cardiology 56 years experience
Echocardiogram: Echocardiogram
Shows the structure
Not routinely necessary if no symptoms and normal exam
814 viewsAnswered >2 years ago
A female asked:
Dr. Louis Grenzeranswered
Cardiology 56 years experience
Who knows?: There is no such thing. It is probably his way of saying don't worry about "it".
3.8k viewsReviewed >2 years ago
A 21-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 56 years experience
See below: You are more likely to notice the shortness of breath after you stop and maybe that is why you stopped in the first place. Keep walking and you will e... Read More
6.2k viewsReviewed >2 years ago
A 44-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 56 years experience
Hypnosis can help: Hypnosis can be very helpful in patients with phobias. Well it is not unreasonable to fear death, or heights, or spiders, or snakes but when the fear ... Read More
5.9k viewsReviewed >2 years ago
A 18-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 56 years experience
Depends: Low blood pressure might be a good thing. People live longer. It's just a number. If you feel fine, it is unlikely a problem. Now if you are sick and ... Read More
6.2k viewsReviewed >2 years agoMerged
A 37-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 56 years experience
Several things: The case is made of titanium, the batteries are lithium, /iodine cells, the electrodes are thin insulated wires, and the circuit boards contain resist... Read More
6.2k viewsReviewed >2 years ago
A 53-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 56 years experience
Has changed: When i started out, we said your age plus one hundred for the systolic. Then we said lower than 140/90. Studies have shown pretty much that the lower ... Read More
6.2k viewsReviewed >2 years ago
A 39-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 56 years experience
Monitor patient: Monitor vital signs (blood pressure weight, and pulse), patient may be on heart monitor), administer oyxgen and medications, monitor urinte output, pe... Read More
6.2k viewsReviewed >2 years ago
A 42-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 56 years experience
Faster: With exercise the heart rate usually speeds up.
6.2k viewsReviewed >2 years ago
A 26-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 56 years experience
Good for pain: Bipass is very successful in relieving angina pectoris, pain related to blockage in the arteries. In most circumstances, there is not good evidence th... Read More
6.2k viewsAnswered >2 years ago
A 32-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 56 years experience
Backward flow: The leaflets of the valve are not closing perfectly and some blood goes backwards from the left ventricle into the left atrium. Minor leaks are common... Read More
6.1k viewsReviewed >2 years ago
A 29-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 56 years experience
Fixed rate: I assume you mean fixed rate pacemakers. We don't use them anymore. The very earliest pacemakers just fired at whatever rate you set them, once a seco... Read More
6.1k viewsReviewed >2 years ago
A 35-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 56 years experience
Sometimes: Heart burn is a description of pain, a burning sensation in the chest. If it is related to exertion, it would be more likely to be a heart problem. If... Read More
6.3k viewsAnswered >2 years ago
A 30-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 56 years experience
Probably not: There is a tachycardia-induced cardiomyopathy which is occasionally seen in people with a chronic tachycardia. The exact rate necessary to produce the... Read More
6.2k viewsReviewed >2 years ago
A 42-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 56 years experience
Lower blood pressure: Diuretics are commonly used to treat high blood pressure of fluid retention such as that caused by heart failure (a weakness in the heart muscle.) so ... Read More
6.3k viewsAnswered >2 years ago
A 38-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 56 years experience
Probably not: Pain or numbness in the left arm or hand can be associated with heart attacks. However, there usually are other symptoms such as chest pain, shortness... Read More
6.2k viewsReviewed >2 years ago
A 47-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 56 years experience
Yes: If it truly is high, you need some tests to determine if there is an unusual reason for the high blood pressure. If it is just primary hypertension it... Read More
6.2k viewsReviewed >2 years ago
A 37-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 56 years experience
Surgery: In general surgery is required. Investigationally, this can be repaired by inserting a catheter into a blood vessel in the groin, up into the heart, a... Read More
6.2k viewsReviewed >2 years ago
A 32-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 56 years experience
Several things: First i would want to be sure that the anxiety is the real cause for the shortness of breath.People get anxious if they can't breathe so there might b... Read More
6.2k viewsReviewed >2 years ago
A 53-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 56 years experience
See doctor: There are many treatments for COPD but the word cure is probably not very appropriate. You can improve but it is doubtful you will be cured. First the... Read More
6.2k viewsReviewed >2 years ago
A 27-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 56 years experience
Several things: Pain medications such as non-steroidals or a course of steroid medication, heat, injections into the area may all be helpful. Improve your posture. Th... Read More
6.2k viewsAnswered >2 years ago
A 40-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 56 years experience
Not necessary: Any healthcare worker, especially those dealing with ct scans, would be aware that there are those who because of anxiety cannot take a ct scan. Some ... Read More
6.2k viewsAnswered >2 years ago
A 24-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 56 years experience
Probably does not: Although it is commonly believed that arthritis is worse in damp and cold weather, studies have not really confirmed this. At best, the relationship i... Read More
6.2k viewsReviewed >2 years ago
A 28-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 56 years experience
Several things: Pain medicines, anti inflamatory medicines, back excercises, heat, ultrasound, steroids either by mouth or injected into the area, and as a last resor... Read More
6.2k viewsAnswered >2 years ago
A 40-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 56 years experience
No: I would not think there is any relation between the 5 hours of sleep and shortness of breath.
6.2k viewsAnswered >2 years ago
A 23-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 56 years experience
Rhythm problem: It is common even in young healthy persons for the heart to suddenly skip, beat to fast, or beat irregularly. Although this may be a disturbing sympto... Read More
6.2k viewsReviewed >2 years ago
A 53-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 56 years experience
Probably: The triglycerides are much more labile than the cholesterol and do go up substantially after eating. You need a low carbohydrate diet. I doubt if many... Read More
6.2k viewsReviewed >2 years ago
A 36-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 56 years experience
Not a medical term: Heartache refers to mental anguish or suffering such as when you have a bad relationship. It is not usually referring to chest pain related to the hea... Read More
6.1k viewsReviewed >2 years ago
A 34-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 56 years experience
MUFAs: The fat in almonds is monounsaturated fat. This actually will lower the cholesterol. Almonds, paradoxically, have been found to help people lose weigh... Read More
6.2k viewsReviewed >2 years ago
A 38-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 56 years experience
Boyfriend?: Just kidding but there is an old song "you're not sick you're just in love." seriously, take your pulse and see if it really is irregular when you fee... Read More
6.2k viewsReviewed >2 years ago
A 28-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 56 years experience
Probably nerve: Because of your age, the fact that it is your right arm and not the left, and because you do not mention chest pain, this is most likely caused by pre... Read More
6.2k viewsReviewed >2 years ago
A 37-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 56 years experience
Two ways: Either by pumping out more blood with each beat (by squeezing harder) or by beating faster. The output is the heart rate times the stroke volume. (the... Read More
6.3k viewsAnswered >2 years ago
A 34-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 56 years experience
Not sure: I am not sure i understand the question. Palpitations can occur at specific times such as late at night when you are lying down. Or they can occur af... Read More
6.2k viewsReviewed >2 years ago
A 25-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 56 years experience
Prevent chest pain: The nitroglycerine is absorbed through the skin and tends to prevent chest pain. The same medicine can also be given in pill form.
6.2k viewsAnswered >2 years ago
A 27-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 56 years experience
Yes: There are many causes of palpitations, so in an individual case it could be something else, but ginseng is a stimulant and has been reported to be res... Read More
6.2k viewsReviewed >2 years ago
A 40-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 56 years experience
Yes: Palpitations are common in menopause and are related to changes in hormone levels. Hormones are commonly given to women to treat those symptoms. Palpi... Read More
6.2k viewsReviewed >2 years ago
A 34-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 56 years experience
See below: Esophagus spasm would be more likely to produce pain whereas palpitation is usually a fluttering sensation. The word palpitation refers to the feeling... Read More
6.2k viewsReviewed >2 years ago
A 25-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 56 years experience
Open: The bicuspid or mitral valve would be open when the left atrium contracts. It opens during diastole (heart is relaxed) and blood is flowing from the a... Read More
6.2k viewsReviewed >2 years ago
A 34-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 56 years experience
See doctor: I recognize ecotrin (aspirin) but do not know what those other medicines are. You have three risk factors at least and are short of breath. You need a... Read More
6.1k viewsReviewed >2 years ago
A 19-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 56 years experience
Anxiety: I believe that the shaking is an emotional response to the arguing. Probably you are raising your blood pressure as well. You should try to calm down.... Read More
6.1k viewsReviewed >2 years ago
A 40-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 56 years experience
Yes and no: It is probably a benign situation. That said, you should have it checked out to be sure.
6.1k viewsReviewed >2 years ago
A 33-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 56 years experience
Peripheral: It is caused by pressure on the sciatic nerve which is a part of the peripheral nervous system.
6.1k viewsReviewed >2 years ago
A 20-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 56 years experience
None: I do not know of any diet pill that is both safe and effective so that I do not recommend any.
6.1k viewsReviewed >2 years ago
A 18-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 56 years experience
Pneumothorax: There is a condition called noisy pneumothorax that can cause this. It is a small pneumothorax on the left. Loud
popping sounds can occur with certai... Read More
6.1k viewsReviewed >2 years ago
A 24-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 56 years experience
Not sure: Your age rules heavily against coronary disease although I have very rarely seen it in a young person. Do you have risk factors? More likely this is s... Read More
6.1k viewsReviewed >2 years ago
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TestimonialsRecommendations and Thank you notes are endorsements given from patients or other doctors.
Recommendations and Thank you notes are endorsements given from patients or other doctors.
6
Recommendations
866
Thank you notes
Apr 20, 2015
Great doctor. Consistently gives thoughtful, insightful and expert advice.
HealthTap member
Mar 30, 2015
Dr. Grenzer is an amazing doctor! #nationaldoctorsday2015 #virtualflower1
HealthTap member
Mar 31, 2015
Dr. Grenzer is an amazing doctor! #nationaldoctorsday2015 #virtualflower1
HealthTap member
Thank you for responding my S/O of 15 yrs was recently diagnosed with 3rd stage lung cancer and now he's in pain but I think some of it is in his head and I worry about the narcotics
HealthTap member
Trying to understand this app on my phone. I have left side chest pain since I-ve been sneezing a lot due to cedar allergies sharp and dull
HealthTap member
Thank you very much,I'm a kidney transplant patient and was told today about the heart, and was told to take potassium . Doesn't sound righ
Education & Training
Medical/Graduate school
University of Maryland School of Medicine, MD
Graduated 1966MD
Awards
Top Cardiologist , First Place, Maryland - Fall
2014
Top Cardiologist, First Place, Maryland - Spring
2017
Top Cardiologist, First Place, Maryland - Fall
2017
Publications
90,000 U.S. doctors in 147 specialties are here to answer your questions, provide medical advice, write prescriptions, and more.
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