Common "Bundle Branch Block" queries answered by top doctors | iCliniq

Bundle Branch Block

Bundle branch block causes delay or block in the electrical pathway, through which impulses travel and make the heart beat. It can be caused due to heart attacks, cardiomyopathy, myocarditis, and hypertension. Mostly it does not cause any symptom, and sometimes it results in fainting.

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What is the relevant test for left bundle branch block?

Query: Hello doctor, I was diagnosed with a left branch bundle block a few years back. I have been under the care of a cardiologist to make sure my heart is fine since then. I have done stress echos yearly or every two years since and have been told my heart is otherwise fine. I just had to switch the othe...  Read Full »

Dr. Sagar Ramesh Makode

Answer: Hello, Welcome to Treadmill test is not very informative in case of lbbb (left bundle branch block) patient, however, stress echo either exercise or nuclear is valid. Stress thallium is the best test to be done in you. I guess you did not have any symptoms like chest pain or heaviness ...  Read Full »

How serious is bifascicular block in young people?

Query: Hello doctor, I am wondering how serious is bifascicular block? Is it common among younger people? I am only 30 years old and this came up on EKG. I was very surprised as I live a pretty healthy life. Any ideas what caused this and what steps I should take next?  Read Full »

Dr. Muhammad Zohaib Siddiq

Answer: Hi, Welcome to I can understand your worries. It is not common in general population. It occurs mostly in those who have heart attack, angina, have high blood pressure or some valvular disease, especially aortic valve. Other cause is fibrotic degeneration of conduction channels, but i...  Read Full »

Is there any specific thing to look for on an EKG to show bifascicular block?

Query: Hello doctor,I am wondering if there is any specific thing to look for on an EKG to show a bifascicular block. I am trying to learn EKG reading and was wondering if you can help me.  Read Full »

Dr. Muhammad Zohaib Siddiq

Answer: Hi, Welcome to Look for the right bundle branch block and axis deviation. If the left anterior or posterior hemiblock is also present, this makes it bifascicular block. If AV block (atrioventricular block) also, this makes trifascicular block. If the left anterior and posterior blocks...  Read Full »

Can you please tell me the difference between the left and right bundle branch block?

Query: Hello doctor, Can you please tell me the difference between the left and right bundle branch blocks? And why is left considered far more dangerous?  Read Full »

Dr. Muhammad Zohaib Siddiq

Answer: Hi,Welcome to heart needs a current to beat. Current is generated in the sino-atrial node. It is like an electric generator. It travels via bundle branches, which are like wires. Current goes from SA (sinus node) node to AV (atrioventricular node) node via atrial bundles. Then from A...  Read Full »

What exactly is a right bundle branch block?

Query: Hi doctor, My ECG report says that I have a right bundle branch block. What is it? Does it require attention?  Read Full »

Dr. Shoaib Javeed Khan

Answer: Hello, Welcome to The heart works on electrical signals/impulses that are sent through a pathway. This finally reaches the side/part of the heart that produces the heartbeat. This pathway is complicated. And when there is any abnormality along this pathway, it can result in a conditio...  Read Full »

Do I need to consult a cardiologist in-person to evaluate my right bundle branch block?

Query: Hello doctor, I am a 45-year-old male. My BMI is 29. I have been diagnosed with an incomplete right bundle branch block QRS duration of 97 milliseconds. I do not have high blood pressure, and I exercise daily. My doctor said no further action was needed. Do I need a cardiologist appointment for furt...  Read Full »

Dr. Muhammad Zohaib Siddiq

Answer: Hello, Welcome to Is there any family history of a cardiac issue or sudden cardiac death? Did you ever have syncope? Kindly attach your ECG (electrocardiogram) report to help you better. Regards.  Read Full »

How does RBBB affect cardiovascular health and exercise capacity?

Query: Hello doctor, I am a 24-year-old individual with a height of 66.14 inches and a weight of 141.09 pounds. I have been diagnosed with the RBBB. Previously, I have experienced severe heart palpitations and mild chest discomfort in the middle of my chest, which comes and goes. I am wondering if it is s...  Read Full »

Dr. Chibitam Hope Obia

Answer: Hello, Welcome back to I can understand your concern. I am very sorry about your medical condition. Please know that I am here to support and take care of you. Regarding your concerns, it is important to avoid activities that could potentially trigger rapid heartbeat, as right bundle...  Read Full »

My husband have dizziness and chest pain. Is it serious?

Query: Hello doctor, My husband went to the hospital before four days because he felt dizziness and chest pain. They found no troponin and told us his EKG was fine. His bp was 105/70 mmHg in the hospital. The next day we went to a cardiologist and found partial right bundle block and he ordered more tests...  Read Full »

Dr. Isaac Gana

Answer: Hello, Welcome to Thanks for your detailed explanation. I understand your worries, but there is nothing much to worry about. It is common to have an event of fainting and dizziness, I see often amongst my patients with RBBB (right bundle branch block). RBBB is due to a slow heart rate...  Read Full »

My son's ECG shows left ventricular hypertrophy. What to do?

Query: Hi doctor, My son is 12 years old, very active, plays representative basketball and attends a sports high school. Last Sunday, he was knocked over while playing and hurt his arm. After getting up, he fainted. He was fine after that. There were no broken bones, but the medical center did an ECG, and ...  Read Full »

Dr. Sagar Ramesh Makode

Answer: Hello, Welcome to The ECG (electrocardiogram) is showing incomplete RBBB (right bundle branch block) or early RBBB and features of left ventricular hypertrophy, and also heart rate is on lower side nearing 60 beats per minute. But as you mentioned, he is a basketball player. So, athle...  Read Full »

Is jerky septum a normal finding seen on the echocardiogram?

Query: Hello doctor, I am 50 years old. My echo is normal with LVEF of 50% and dobutamine stress test negative for ischemia (LVEF of 58%). But, it shows a jerky septum? Is jerky septum a normal finding?  Read Full »

Dr. Sapkal Ganeshrao Patilba

Answer: Hello, Welcome to There are a few causes of jerky septum like bundle branch block, increased pressure in the right side of the heart, and disease in the pericardium. As your echo is normal, because of increased pressure on the right side of the heart, disease in pericardium is les...  Read Full »

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