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Dr. Irv Loh

Cardiology
Newbury Park, CA
50 years experience male

Locations

Ventura Heart Institute

Newbury Park, CA

Address

1000 Newbury Road, Suite 180, Newbury Park, CA
Directions

My office hours

Wednesday: 1:00pm - 4:00pm
Show more

Practice website

Fax

(805) 480-2677

About

Bio

MD from University of California - San Francisco (Regents Scholar, elected AOA as a junior). Internal medicine training at UCSF Hospitals. Cardiology fellow at Cedars-Sinai Medical Center in Los Angeles, CA. Board certified Internal Medicine, Subspecialty Cardiovascular Diseases; Staff Associate Lipid Metabolism/Molecular Diseases at National Heart Lung and Blood Institute/National Institutes of Health; Science Project Officer, Cardiac Diseases Branch/Division of Heart and Vascular Diseases/National Heart Lung and Blood Institute/National Institutes of Health; Staff Cardiologist at Cedars-Sinai Medical Center jointly in Department of Cardiology and Department of Thoracic and Cardiac Surgery; now Director of Ventura Heart Institute and Principal Investigator - Cardiovascular at Westlake Medical Research (Principal Investigator on over 160 clinical trials (phase 1b, 2, 3); Consultant and lecturer to the healthcare industry as well as the Ventura County Health Care Agency on development and deployment of cardiovascular disease management, clinical research, and information technology to improve quality of care and patient outcome. TED talk on how medical advances are validated (YouTube). Curator of Sermo's Cardiology Hub. Co-Founder and Chief Medical Officer of Infermedica (artificial intelligence and machine learning to improve clinical decision making).

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

Clinical Lipidology

Internal Medicine

Preventive Medicine

Licenses

United States: California

Languages spoken

English

Doctor Q&A

290 Answers
1 Agree
The number of answers this doctor has agreed with.
A 35-year-old member asked:
Dr. Irv Loh
Dr. Irv Lohanswered
Cardiology 50 years experience
No real impact: If otherwise genetically normal, no real clinical issues.
A 30-year-old male asked:
Dr. Irv Loh
Dr. Irv Lohanswered
Cardiology 50 years experience
Type of fat: Not all fats are detrimental to the vascular system, though they all have similar calorie content. The "saturation", or number of "double bonds" that... Read More
A 42-year-old member asked:
Dr. Irv Loh
Dr. Irv Lohanswered
Cardiology 50 years experience
Not much: Treatment of elevated lp(a) is a bit tough. Potent statins can mitigate the risk by lowering the ldl-cholesterol level as much as possible (below 70 m... Read More
A 38-year-old member asked:
Dr. Irv Loh
Dr. Irv Lohanswered
Cardiology 50 years experience
Lab error: Cholesterol revels are dominantly genetically based, with gradual rises with increasing age. Good and bad diets cause some modest fluctuations. Egre... Read More
A 33-year-old member asked:
Dr. Irv Loh
Dr. Irv Lohanswered
Cardiology 50 years experience
Get solid data: If you are indeed having dizziness with a variable heart rate and blood pressure, you really should consult with your healthcare provider to determine... Read More
A 38-year-old female asked:
Dr. Irv Loh
Dr. Irv Lohanswered
Cardiology 50 years experience
Variable: Some people have no symptoms whatsoever. Others, depending how fast the ventricular heart rate, may have "fluttering", or palpitations, or sudden loss... Read More
A 48-year-old male asked:
Dr. Irv Loh
Dr. Irv Lohanswered
Cardiology 50 years experience
Slightly: Because cholesterol synthesis is maximal around midnight if your sleep pattern is normal, and maximal onset of action with Simvastatin is a few hours ... Read More
A 36-year-old member asked:
Dr. Irv Loh
Dr. Irv Lohanswered
Cardiology 50 years experience
All may do it: The vast majority of patients on any currently approved statin at recommended doses have no muscle aches. At high doses, all statins likely may produ... Read More
A 55-year-old male asked:
Dr. Irv Loh
Dr. Irv Lohanswered
Cardiology 50 years experience
Neither: The hard core evidence base for ubiquinone pathway supplements to avoid statin associated myalgias is pretty scarce. Some investigators quibble over ... Read More
A 45-year-old member asked:
Dr. Irv Loh
Dr. Irv Lohanswered
Cardiology 50 years experience
Confirm with doctor: Drugstore blood pressure machines tend to run low, so reproducible high blood pressure readings warrant follow up with your healthcare provider to con... Read More
A 46-year-old member asked:
Dr. Irv Loh
Dr. Irv Lohanswered
Cardiology 50 years experience
More focused: Long qt syndrome, especially if famiial or genetic, has grave inplications vis a vis risk of sudden cardiac death from high grade ventricular arrhythm... Read More
A 32-year-old member asked:
Dr. Irv Loh
Dr. Irv Lohanswered
Cardiology 50 years experience
Other way around: Sleep disturbances, especially sleep apnea, can contribute to hypertension and its attendant risks. Managing the sleep disturbance can help ameliorate... Read More
A 24-year-old member asked:
Dr. Irv Loh
Dr. Irv Lohanswered
Cardiology 50 years experience
Actually,not so much: First, cholesterol elevation as a health risk factor has only been recognized for decades, not centuries. Second, people died much younger in the pas... Read More
A 34-year-old member asked:
Dr. Irv Loh
Dr. Irv Lohanswered
Cardiology 50 years experience
Possibly: Some otc diet pills are related to amphetamines (sympathomimetics) and thus may yield positive illicit drug test findings.
A 39-year-old member asked:
Dr. Irv Loh
Dr. Irv Lohanswered
Cardiology 50 years experience
Physically, 6 weeks: Assuming no complications, patients can be discharged within a few days after surgery. The surgical wounds heal within a couple of weeks. If a stern... Read More
A 35-year-old member asked:
Dr. Irv Loh
Dr. Irv Lohanswered
Cardiology 50 years experience
None per se: Cardiomegaly simply means heart enlargement, which is a physiologic compensatory mechanism. By itself, it may have no symptoms. It's the cause of the... Read More
A 40-year-old member asked:
Dr. Irv Loh
Dr. Irv Lohanswered
Cardiology 50 years experience
Depends: Assuming you tolerate low dose Aspirin and have had no event or multiple risk factors, epidemiologic data would suggest that men may benefit in their ... Read More
A 29-year-old member asked:
Dr. Irv Loh
Dr. Irv Lohanswered
Cardiology 50 years experience
Complicated molecule: Hdl-c is more than a scavenger particle of cholesterol in blood vessels. It has antioxidant, anti-inflammatory, thrombotic characteristics as well. Th... Read More
A 44-year-old member asked:
Dr. Irv Loh
Dr. Irv Lohanswered
Cardiology 50 years experience
Few days (depends): Adverse effects of meds are related to their half life in your body. Long acting drugs, like atenolol, may take a few days to get out o your system. B... Read More
A 42-year-old member asked:
Dr. Irv Loh
Dr. Irv Lohanswered
Cardiology 50 years experience
No good evidence: Best currently available agent is Niacin to both lower LDL cholesterol and raise hdl-cholesterol. Not niacinamide, and not no-flush niacin. There are ... Read More
A 37-year-old member asked:
Dr. Irv Loh
Dr. Irv Lohanswered
Cardiology 50 years experience
Not lifestyle issue: Primary cushing's syndrome is the result of an endocrine active mass of adrenal gland cells that become so not as a result of lifestyle habits (good o... Read More
A 21-year-old female asked:
Dr. Irv Loh
Dr. Irv Lohanswered
Cardiology 50 years experience
Varies by indication: There are many diuretic available for use, most often, of course, to control excess fluid accumulation. Depending on the cause and the urgency, docto... Read More
A member asked:
Dr. Irv Loh
Dr. Irv Lohanswered
Cardiology 50 years experience
Avoid known causes: You really need to sort out if what you sense as an arrhythmia is truly a heart rhythm problem or not, and determine if it's benign, o not. This will ... Read More
A 41-year-old member asked:
Dr. Irv Loh
Dr. Irv Lohanswered
Cardiology 50 years experience
Not that many: This is, in its pure form, a relatively uncommon form of cardiac chest discomfort, presenting with characteristic signs and symptoms, and treated with... Read More
A 24-year-old member asked:
Dr. Irv Loh
Dr. Irv Lohanswered
Cardiology 50 years experience
Elevated blood fats: This is a broad topic with variable implications. Fats are normal components of the blood, but elevated values are common. Which fats are elevated t... Read More
A 41-year-old member asked:
Dr. Irv Loh
Dr. Irv Lohanswered
Cardiology 50 years experience
Similar process: Progressive injury to the vascular wall of blood vessels feeding different tissues is the the process. The symptoms arise from compromise of the affe... Read More
A 22-year-old member asked:
Dr. Irv Loh
Dr. Irv Lohanswered
Cardiology 50 years experience
Probably not serious: Although these symptoms may be due to real disease processes, the constellation of these associated symptoms in a 22 year old raise the spectre of hyp... Read More
A 28-year-old female asked:
Dr. Irv Loh
Dr. Irv Lohanswered
Cardiology 50 years experience
Probably not: Swollen ankles are most commonly associated with excess salt in diet, venous insufficiency (e.g., varicosities), compressive clothing. The specter of... Read More
A 25-year-old member asked:
Dr. Irv Loh
Dr. Irv Lohanswered
Cardiology 50 years experience
Need to see it: Silent (or misdiagnosed) heart attacks may be as common as 30-40% of all heart attacks, detected when an ECG is done that demonstrates typical or susp... Read More
A 39-year-old member asked:
Dr. Irv Loh
Dr. Irv Lohanswered
Cardiology 50 years experience
Absolutely: Hypertension just one, albeit important, risk factor in a plethora of identifiable risk factors that can contribute to heart disease. Lower bps are b... Read More
A 47-year-old member asked:
Dr. Irv Loh
Dr. Irv Lohanswered
Cardiology 50 years experience
If true, serious: Fat embolism is usually due to trauma with disruption of long bones like the femur, exposure of the fat in the marrow to the blood space, & then causi... Read More
A 33-year-old member asked:
Dr. Irv Loh
Dr. Irv Lohanswered
Cardiology 50 years experience
Yes: Not uncommon, but usually with people in close proximity to each other, like at schools or on cruise ships.
A 39-year-old member asked:
Dr. Irv Loh
Dr. Irv Lohanswered
Cardiology 50 years experience
High blood pressure: Hypertension is a validated major risk factor for cardiovascular disease, and requires thoughtful and effective treatment. Most cases of low blood pr... Read More
A 40-year-old member asked:
Dr. Irv Loh
Dr. Irv Lohanswered
Cardiology 50 years experience
Several important: Assuming it's for atrial fibrillation (af), it depends on duration of the af. If it's been a few days, anticoagulants to avoid systemic embolization,... Read More
A 35-year-old member asked:
Dr. Irv Loh
Dr. Irv Lohanswered
Cardiology 50 years experience
Depends: Which "heart enzymes" and when they are noted to be how high are all potentially important markers of underlying disease and prognosis. Although ther... Read More
A 41-year-old member asked:
Dr. Irv Loh
Dr. Irv Lohanswered
Cardiology 50 years experience
Maybe. Depends!: Patients often feel their heart beats more at night, not because something happens to them when they lie down (though bad dreams and aggravation can c... Read More
A 41-year-old member asked:
Dr. Irv Loh
Dr. Irv Lohanswered
Cardiology 50 years experience
Not directly: Cardiac output is the amount of blood flow generated by the heart over a given time frame. Potassium is a critical electrolyte for body health and ca... Read More
A 44-year-old member asked:
Dr. Irv Loh
Dr. Irv Lohanswered
Cardiology 50 years experience
Completely variable!: Depends on the cause and mechanism of the irregular heart beat. May last seconds to days or more. Plus depends on one's sensitivity, i.e., some patie... Read More
A 42-year-old member asked:
Dr. Irv Loh
Dr. Irv Lohanswered
Cardiology 50 years experience
Worse if higher: The consensus panels that assess best management of high blood pressure have traditionally "staged" blood pressure severity, with the higher numbers, ... Read More
A 24-year-old member asked:
Dr. Irv Loh
Dr. Irv Lohanswered
Cardiology 50 years experience
Almost anyone: If there is any compromise in bp, consciousness, breathing, anyone can be cardioverted. If more chronic, then making sure there is a low probability ... Read More
A 32-year-old member asked:
Dr. Irv Loh
Dr. Irv Lohanswered
Cardiology 50 years experience
Depends: The procedure itself, if just a diagnostic coronary angiogram, may be over within a half hour, but if there are interventions, or valvular or congenit... Read More
A 35-year-old member asked:
Dr. Irv Loh
Dr. Irv Lohanswered
Cardiology 50 years experience
Complete imaging: The heart is a 3 dimensional structure and the images are 2 dimensional. To completely visualize the entire heart, you need more than one view. Hard... Read More
A 38-year-old member asked:
Dr. Irv Loh
Dr. Irv Lohanswered
Cardiology 50 years experience
Variable: Sharp chest discomfort, especially if only lasting a few seconds, is usually benign and most likely musculoskeletal in origin. Much depends on where ... Read More
A 31-year-old member asked:
Dr. Irv Loh
Dr. Irv Lohanswered
Cardiology 50 years experience
No: There are many causes of pericarditis, usually infectious or immunologic in origin, with therapy dictated by the underlying cause. But it is not thou... Read More
A 40-year-old member asked:
Dr. Irv Loh
Dr. Irv Lohanswered
Cardiology 50 years experience
May be normal: If the elevated blood pressure is truly transient, it may just be "white coat hypertension", induced by anxiety or stress. Although not entirely beni... Read More
A 37-year-old member asked:
Dr. Irv Loh
Dr. Irv Lohanswered
Cardiology 50 years experience
Possibly: A dose higher than one needs may cause an elevation of the heart rate or blood pressure that causes the metabolic demand for oxygen by the heart to ex... Read More
A 35-year-old member asked:
Dr. Irv Loh
Dr. Irv Lohanswered
Cardiology 50 years experience
Depends: New onset atrial fibrillation is often self limited, going away by itself. But the cause dictates the subsequent course. Thus treating things like h... Read More
A 38-year-old member asked:
Dr. Irv Loh
Dr. Irv Lohanswered
Cardiology 50 years experience
Difficult to prevent: Damage to heart muscle resulting in injury signficantly compromising function can be due to many causes, most commonly due to coronary artery disease.... Read More
A 27-year-old member asked:
Dr. Irv Loh
Dr. Irv Lohanswered
Cardiology 50 years experience
Usually not: Svt can be part of heritable cardiac conditions, so in that sense the svt can be passed down by parents. But the arrhythmia itself usually is not per ... Read More
A 48-year-old member asked:
Dr. Irv Loh
Dr. Irv Lohanswered
Cardiology 50 years experience
Metoprolol: There are many agents that formularies or drug benefit managers will use to substitute for toprol. These will be generic beta-blocker drugs that inhi... Read More

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

5
Recommendations
648
Thank you notes
HealthTap member
Jan 17, 2012
he ansewered a question to a problem i have been needing an ansewer to for a while
HealthTap member
Sep 14, 2014
Dr. Loh answered an important question for me on Friday evening. Thank you!!
HealthTap member
Mar 30, 2015
Dr. Loh is an amazing doctor! #nationaldoctorsday2015 #virtualflower1
HealthTap member
This was very helpful. Thanks! I had it done at cedars 5 months ago and they say its not all solid until 6 months…2nd aortic valve replacement need to work out hard now am I ready?
HealthTap member
Thanks for your quick reply. I have Ben heard operated as open heart operation Sean's 2010-10/02 and I stel have problem. Thank you anyway.
HealthTap member
Thanks for your quick reply! I also hv sickle cell anaemia and my blood pressure is usually low. I was also diagnosed bronchiectasis 2011.

Education & Training

Medical/Graduate school

UC San Francisco School of Medicine, CA
Graduated 1972MD

Residency

UCSF MEDICAL CENTER

Awards

Most Influential, Second Place, Ventura Region, CA - Summer
2013
Top Cardiologist , First Place, Ventura Region, CA - Summer
2013
HealthTap Founding Doctor
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