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 25-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 57 years experience
Yes: The ESR is increased by inflammation and goes up within a few days of a myocardial infarction. It may remain high for a few weeks.
Created for people with ongoing healthcare needs but benefits everyone.
6.1k viewsReviewed >2 years ago
A 38-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 57 years experience
It is not always: A low blood pressure in many cases is not a problem. If it is low for some bad reason such as bleeding or deyhdration, the blood supply to vital organ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
6.2k viewsReviewed >2 years ago
A 28-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 57 years experience
MEASUREMENTS: There are various measurements made of heart structures, such as thickness of the heart muscle, or diameter of the chambers and blood vessels. A calip... Read More
Created for people with ongoing healthcare needs but benefits everyone.
6.2k viewsReviewed >2 years ago
A 27-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 57 years experience
2 things: The echocardiogram shows the structures. It is like a motion picture of the heart muscle, valves, and other structures. The doppler shows the flow of ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
6.2k viewsAnswered >2 years ago
A 44-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 57 years experience
Yes and no: Although I do not believe there is a cause and effect relation between the two, certain types of patients have both. For instance, patients with mitra... Read More
Created for people with ongoing healthcare needs but benefits everyone.
6.2k viewsReviewed >2 years ago
A 34-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 57 years experience
A long time: Bradycardia is not related to survival unless there is a severe bradycardia related to heart block. Bradycardia can be a normal finding.
Created for people with ongoing healthcare needs but benefits everyone.
6.1k viewsReviewed >2 years ago
A 27-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 57 years experience
That depends: The pacemaker itself is not a problem. However, riding a roller coaster can be stressful to some. (such as me!). If you also have coronary artery dise... Read More
Created for people with ongoing healthcare needs but benefits everyone.
6.3k viewsReviewed >2 years ago
A 40-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 57 years experience
Higher risk: The chances of bad outcomes such as heart attack and stroke are increased by those and other risk factors. I would rather prevent than treat them. Why... Read More
Created for people with ongoing healthcare needs but benefits everyone.
6.1k viewsReviewed >2 years ago
A 32-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 57 years experience
424.1: The closest I have been able to find is 424.1, aortic valve disorders. I cannot find a specific code for stenosis.
Created for people with ongoing healthcare needs but benefits everyone.
6.2k viewsReviewed >2 years ago
A 30-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 57 years experience
Depends: It depends on how severe it is. It can be very mild or very severe. In general many people with treatment can do quite well but the potential for dete... Read More
Created for people with ongoing healthcare needs but benefits everyone.
6.2k viewsReviewed >2 years ago
A 41-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 57 years experience
What are u drinking?: Well i never saw this on a beer label. Caution is advised in taking that drug with alcohol because of bleeding issues but i never saw it on a label. C... Read More
Created for people with ongoing healthcare needs but benefits everyone.
6.2k viewsReviewed >2 years ago
A 34-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 57 years experience
See below: Coronary disese, that is disease involving the arteries that supply the heart is one type of heart disease. Others are valve disease and disease direc... Read More
Created for people with ongoing healthcare needs but benefits everyone.
6.2k viewsReviewed >2 years ago
A 27-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 57 years experience
Depends: That would depend on what organ system is involved in the ischemia. If the brain, for instance, weakness of one side of the body, numbness, visual los... Read More
Created for people with ongoing healthcare needs but benefits everyone.
6.1k viewsReviewed >2 years ago
A 39-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 57 years experience
Yes: The term ascites praecox does refer specifically to ascites (fluid in abdominal cavity) secondary to constrictive pericaritis. It may occur prior to t... Read More
Created for people with ongoing healthcare needs but benefits everyone.
6.2k viewsReviewed >2 years ago
A 40-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 57 years experience
Medications: Medications to prevent recurrence of the rhythm, to control the heart rate if it does recur, and either Aspirin or in some cases warfarin or dabigatra... Read More
Created for people with ongoing healthcare needs but benefits everyone.
6.3k viewsReviewed >2 years ago
A 32-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 57 years experience
Artery blocked: A coronary artery has a blockage so that the heart muscle is not getting enough blood. A vein or artery is connected to the coronary artery past the ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
6.2k viewsReviewed >2 years ago
A 39-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 57 years experience
See below: It is the pressure in your arteries. If it is too high, it can cause complications such as stroke. It can also be too low for a number or reasons suc... Read More
Created for people with ongoing healthcare needs but benefits everyone.
6.2k viewsReviewed >2 years ago
A 30-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 57 years experience
Muscle not dead: The nuclear picture of the heart shows a hole in the muscle during exercise (stress) but not at rest. The muscle is alive and not permanently damaged.... Read More
Created for people with ongoing healthcare needs but benefits everyone.
6.2k viewsReviewed >2 years ago
A 27-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 57 years experience
See below: First a degree in nursing as an rn. The only other requirement that i know of is to be certified in cpr, that is bcls and acls. (basic and andvanced c... Read More
Created for people with ongoing healthcare needs but benefits everyone.
6.2k viewsReviewed >2 years ago
A 25-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 57 years experience
Control: We have medications to treat the symptoms of heart failure. But most of the time we are not actually curing it but controlling it. There are occasiona... Read More
Created for people with ongoing healthcare needs but benefits everyone.
6.2k viewsReviewed >2 years ago
A 28-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 57 years experience
Several things: In the first place, it is not normal to have a build up of fluid around the heart., when the fluid is removed, it would be abnormal to have bacteria g... Read More
Created for people with ongoing healthcare needs but benefits everyone.
6.3k viewsAnswered >2 years ago
A 38-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 57 years experience
Yes: Not being able to breathe is one of those things that can lead to panic. It becomes hard to tell which is the worse problem. So you could have fairly ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
6.2k viewsReviewed >2 years ago
A 47-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 57 years experience
Any: The low dosage of beta blocker would not especially influence my choice of a second agent except for the fact that medications like verapamil or Dilti... Read More
Created for people with ongoing healthcare needs but benefits everyone.
6.2k viewsReviewed >2 years ago
A 40-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 57 years experience
Plantar fasciitis: You probably have plantar fasciitis. The pain characteristically is worse in the morning. If the pain is just in the ball of the foot, then it would b... Read More
Created for people with ongoing healthcare needs but benefits everyone.
6.1k viewsReviewed >2 years ago
A 26-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 57 years experience
It is unpredictable: The problem is not serious just painful. It is rather unpredictable but usually improves eventially. Treatment with medications like Ibuprofen or heat... Read More
Created for people with ongoing healthcare needs but benefits everyone.
6.3k viewsAnswered >2 years ago
A 34-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 57 years experience
Yes: There are several classes of drugs to lower lipids. The most commonly used are called statins and they lower the bad cholesterol. Other drugs, called ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
6.3k viewsReviewed >2 years ago
A 50-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 57 years experience
Maybe: That is possible if the medication irritates the stomach. More commonly, the Plavix (clopidogrel) can contribute to bleeding. It is probable that your... Read More
Created for people with ongoing healthcare needs but benefits everyone.
6.3k viewsReviewed >2 years ago
A 34-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 57 years experience
Not usually: If you have a true panic attack it is not a lung problem but if you have a lung problem and can't breathe, you could certainly feel panic. So before i... Read More
Created for people with ongoing healthcare needs but benefits everyone.
6.2k viewsReviewed >2 years ago
A 31-year-old member asked:
A persistant low blood pressure 60/90 over 10 days. what does it indicate for a house wife aged 40.?
Dr. Louis Grenzeranswered
Cardiology 57 years experience
Depends: I assume you mean 90/60 as the first number is always higher. That is a lower than average blood pressure. If you feel ok, don't worry about it. Peopl... Read More
Created for people with ongoing healthcare needs but benefits everyone.
6.2k viewsReviewed >2 years ago
A 25-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 57 years experience
Several: Make sure you are at a place where they do a lot of valve surgery. You should ask what kind of valve they will use and why. In some cases, that determ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
6.2k viewsReviewed >2 years ago
A 39-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 57 years experience
I believe it can: Hypnosis has been used for this disorder. I personally have not treated such a case but have had success with similar conditions such as torticollis a... Read More
Created for people with ongoing healthcare needs but benefits everyone.
6.2k viewsAnswered >2 years ago
A 21-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 57 years experience
Yes: Although eating disorders are much more common in young women, they can occur in men as well. If you want to exclude plain old obesity as an eating di... Read More
Created for people with ongoing healthcare needs but benefits everyone.
6.2k viewsReviewed >2 years ago
A 24-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 57 years experience
Yes: It is sometimes seen intermittently. It can be present on an EKG and not on one done at a later date. At times it occurs when the heart is beating fas... Read More
Created for people with ongoing healthcare needs but benefits everyone.
6.2k viewsReviewed >2 years ago
A 47-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 57 years experience
Doctor clearance: It would be important to have your doctor certify that it is safe to begin the rehab. That would mean that there are no acute problems that could resu... Read More
Created for people with ongoing healthcare needs but benefits everyone.
6.2k viewsAnswered >2 years ago
A 28-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 57 years experience
Sort of: Well it's not inherited like your eye color but the tendency to develop it is inherited related to many factors. High cholesterol, hypertension, diabe... Read More
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6.2k viewsReviewed >2 years ago
A 38-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 57 years experience
Possibly: As most people with LBBB have heart muscle abnormalities, yes. But about 15% of people with left bundle branch block have structurally normal hearts, ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
6.3k viewsAnswered >2 years ago
A 46-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 57 years experience
Yes, sortof: Well the treatment is surgery to remove the blockage which will correct the problem. So if there is successful surgery, the problem has been "cured." ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
6.2k viewsReviewed >2 years ago
A 20-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 57 years experience
Not sure: There are lots of reasons why people retain fluid including heart and/or kidney problems. You need some basic tests to find the reason you are retaini... Read More
Created for people with ongoing healthcare needs but benefits everyone.
6.1k viewsAnswered >2 years ago
A 68-year-old female asked:
Dr. Louis Grenzeranswered
Cardiology 57 years experience
Probably not: It depends on which valve is leaking and how severe the leakage is. But it probably is not dangerous, especially if you feel ok.
Created for people with ongoing healthcare needs but benefits everyone.
5.6k viewsReviewed >2 years ago
A 30-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 57 years experience
Probably not: If you truly just have a common cold, you should not require any treatment other than over the counter symptomatic treatment. However, if you have a h... Read More
Created for people with ongoing healthcare needs but benefits everyone.
6k viewsReviewed >2 years ago
A 33-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 57 years experience
Similar: Congestive heart failure refers to the congestion (fluid buildup) which is seen in the lungs and the legs (swelling) and in the abdomen. (might be swo... Read More
Created for people with ongoing healthcare needs but benefits everyone.
5.9k viewsReviewed >2 years ago
A 21-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 57 years experience
See below: You want something that promotes good posture. Anything that encourates a curvature of the back just above your hips is fine. I bought a special back ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
6.2k viewsReviewed >2 years ago
A 32-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 57 years experience
EKG diagnosis: On the EKG if the qrs (electrical wave cause by the heart muscle depolarizing) is 0.12 seconds or greater, it is by definition complete. Less that tha... Read More
Created for people with ongoing healthcare needs but benefits everyone.
6.3k viewsAnswered >2 years ago
A 36-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 57 years experience
Contracts harder: The cardiac output is the stroke volume times the heart rate. So the heart has to contract harder and/or faster. Typically, in severe anemia, an echoc... Read More
Created for people with ongoing healthcare needs but benefits everyone.
6.2k viewsReviewed >2 years ago
A 34-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 57 years experience
Shocks heart: It monitors the heart rhythm looking for certain dangerous types of rapid heart rhythm. If it detects such a rhythm, it delivers a shock to the heart ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
6.3k viewsReviewed >2 years ago
A 50-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 57 years experience
There is no limit: However, if the rhythm keeps recurring in spite of medication to prevent that, probably better just to use medicine to control the heart rate. Atrial ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
6.3k viewsReviewed >2 years ago
A 24-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 57 years experience
Several: An EKG to see what the exact rhythm is and to look for other abnormalities. A history and physical examination. You may have a heart murmur or appear ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
6.3k viewsReviewed >2 years ago
A 44-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 57 years experience
Several: Heart problems: 1. Block in artery 2. Pericarditis
lung problems: 1. Pneumonia, embolism, tumor
gi problems: 1. Gall bladder 2. Esophagitis or gerd 3.... Read More
Created for people with ongoing healthcare needs but benefits everyone.
6.2k viewsReviewed >2 years ago
A 34-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 57 years experience
Yes: It can result in heart attack, stroke, kidney failure, etc.
Created for people with ongoing healthcare needs but benefits everyone.
6.2k viewsReviewed >2 years ago
A 53-year-old member asked:
Dr. Louis Grenzeranswered
Cardiology 57 years experience
Any: None of the medications used to treat hypertension are absolutely contraindicated by diabetes. We commonly use ace inhibitors or arbs as they tend to ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
6.2k viewsReviewed >2 years ago
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
872
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
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