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Doctor insights on: Ecg Lead Color Code

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Dr. Andrew Berry
3 doctors shared insights

Electrocardiogram (Definition)

Electrocardiogram (ecg, ekg) is a print-out of the electrical forces detected by electrodes on the chest wall, as electricity travels through the heart with each heart beat. The electrodes are placed in different positions, and each position "sees" the electrical activity of the heart from its own vantage point. Abnormalities in signal detected at chest surface ...Read more


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My diagnosis code is 794.31 my dr said in all my visits there's nothing to worry about . Also i had a holter monitor.. And 1 more ekg..

My diagnosis code is 794.31 my dr said in all my visits there's nothing to worry about . Also i had a holter monitor.. And 1 more ekg..

Abnormal EKG finding: 794.31 icd9 code is for abnormal ekg findinds.That might have prompted for your doctor to do further testing like holter monitor and repeat ekg.
You should have discussed with your doctor or cardiologist what the tests were for.
But if the holter monitor was ok, you do not have to worry as your doctor said. ...Read more

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Can 3 lead ECG show much?

Can 3 lead ECG show much?

Yes: While "much" is a relative statement, a 3 lead ECG should be able to help the physician determine your heart rhythm. ...Read more

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Why is it called 12 lead ecg if it only uses 10? Pls explain

The EKG is routinely: performed with 6 chest wires (V1-V6) (six signals or leads) and the four arm wires. 10 wires. The signals from the arm and leg wires are electronically combined to provide a triangular pattern of three leads (signals) I,II,III. And then also electronically combined to produce what is called augmented leads (signals). aVR, aVL, and aVF. 6 more signals (leads). Thus 10 wires and twelve leads. ...Read more

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What is the indication for having a flat t wave in 12 lead ecg?

T Wave flattening : In the absence of clinical history or symptoms, t wave abnormalities such as flattened t waves are nonspecific. They may be seen in healthy individuals, leading to mistaken diagnosis of heart disease. Pathological causes are many & include myocardial ischemia, electrolyte abnormality, stroke, anticancer medications, and even with fever and after eating. Your dr, will tell you more. ...Read more

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On a 3 lead 24h ecg, would it pick up changes from angina like a 12lead?

A 12 lead is better: Depending on the leads and the area affected.It is possible albeit a 12 lead is more definitive. Further testing would rule out ant coronary occlusive disease. ...Read more

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Got Brugadh sign in V1 lead on routine ECG. Echo showed Mild MR. Diagnosis?

Got Brugadh sign in V1 lead on routine ECG. Echo showed Mild MR. Diagnosis?

Brugadh sign: You have a Brugadh sign. This does not mean you have the disease. Only your Dr. can tell you. ...Read more

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My ecg showed a Negative T wave in lead 3 what does this mean? And what could cause this?

My ecg showed a Negative T wave in lead 3 what does this mean? And what could cause this?

ECG: T waves inverted in lead 3 are a nonspecific finding and in and of themselves not a big deal. They must be judged in the context of the whole 12 lead study and clinical information. Ask your Doc about your study and meanwhile don't worry about the test result. ...Read more

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I had a Notched S wave in lead V2 on my ECG is this something serious? It wasn't there 2 years ago.

I had a Notched S wave in lead V2 on my ECG is this something serious? It wasn't there 2 years ago.

Possibly: Need to interpret the ECG in its entirety. May indicate a delay in the electrical conduction in the lower chambers of the heart.

Sometimes stress testing is done to evaluate for coronary artery blockage as an origin for ecg abnormalities. ...Read more

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Male 22. Got a portable 3 lead ECG at home. My P wave can't really be seen but my mums can? How come?

Ectopic atrial rhyth: You might have a ectopic atrial rhythm - which means your arial beats instead of originating in the sa node - originates else where. It is benign and nothing to worry about. Get a standard 12 lead ekg to check. ...Read more

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Hi. I'm a Paramedic and did a 12-lead ECG on myself at work and found an rsr' in V1which I didn't find in an ECG I did a few years ago. Any comments?

ECG: New onset rsr' in the absence of clinical symptoms doesn't carry a lot of meaning. There are a multitude of possibilities. If you are nervous see your doc and discuss to see if evaluation is indicated. ...Read more

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Hi. I'm a Paramedic and when I did a 12-lead ECG on myself at work I found an rsr' complex in V1(rsr' is 0.08s wide). It wasn't there when I did an ECG a couple of years ago. What should I do?

Hi. I'm a Paramedic and when I did a 12-lead ECG on myself at work I found an rsr' complex in V1(rsr' is 0.08s wide). It wasn't there when I did an ECG a couple of years ago. What should I do?

If you have no: cardiac symtoms (dyspnea, chest pain, palpitations, exertional limitation) then do nothing. Perhaps another EKG in a few years for interest. I suspect your conduction system is aging or more likely your lead position or body position was different now than the last time. This could be an early sign of right heart disease so an echo could be useful, nothing would be done until you have symptoms. ...Read more

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What is the 12. Lead ecg?

ECG: It stands for electrocardiogram. It is used to measure the movement of electrical signals in the heart. When working appropriately, this enables your heart to beat and pump blood to the rest of the body. When the heart is damaged or the electrical system is malfunctioning, ECG can pick up changes. ...Read more

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What is a lateral lead mean on an ecg?

See answer: An ekg will have 6 leads on your chest area (called v1 through v6) as well as 1 for each arm and leg. The last 2 leads on the chest (v5-v-6) are called the lateral leads, as well as lead i on the 12 lead ekg sheet. ...Read more

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Lead placement for a five-lead ECG system ?

Usual: White to the right arm, black to the left arm, red to the left leg, green to the right leg, usually the v lead is brown which goes to the precordial placements. ...Read more

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What can cause the p-waves to be missing on a 4 lead ecg?

P waves: If p waves are not seen on the surface ecg, either they are not present or the vector direction of the forces doesn't produce an adequate size p wave to see in the leads available. ...Read more

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My ECG showed repolirisation abnormalities in lead v5 and v6 the t wave was more flat or something is this bad? I'm 23.

Non-specific: What you're describing is rather non-specific, that is, you'd have to combine the EKG findings with a thorough history and physical examination by your primary physician. They may want to, then, refer you to a cardiologist or cardiac electrophysiologist to see if the findings are significant. Call 911 if you pass out, have chest pain, severe dizziness, or sudden onset shortness of breath. ...Read more

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I sometimes have a negative -t in lead 3 on ecg but other times it is positive, it changes every time what can cause this?

ECG: T wave changes as you describe are usually due to changes in vector forces from lead placement and respiration. Other variables also can come into play. In general we don't get excited by them. ...Read more

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I know that standard ecg has 12 leads, but sometimes on some ecg I see additional strip. What is this is there a 13th lead? Could you pls explain

The usual format for: a 12 lead EKG includes a lead II rhythm strip across the bottom of the tracing. That is the strip you are referring to. It is just a continuous lead II not a "13th" lead. ...Read more

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I had 12 lead ECG, my results is LVH by voltage of 5mm /mV. Does this increase to 5mm/mV severe or not? Help. Iam 23, taking amlodopine and telmisarta

I had 12 lead ECG, my results is LVH by voltage of 5mm /mV. Does this increase to 5mm/mV severe or not? Help. Iam 23, taking amlodopine and telmisarta

Non specific: LVH is designated as "by voltage criteria" because that is a weak criterion for diagnosing LVH. (there are at least 25 criteria). Many people your age (23) have high voltage which is perfectly normal. An echo would be more specific. Meanwhile, keep that BP under good control, LVH or not! ...Read more

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How can I differentiate SVT and psvt, when 12 lead ECG showing as like as svt?

How can I differentiate SVT and psvt, when 12 lead ECG showing as like as svt?

No difference: The ekg would look the same. Most people tend to use the terms psvt and svt interchangeably. ...Read more

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I was offered to purchase a personal full 12 lead ECG device that works with my iphone and send ECG by email to a doc. Would your recommend it?

More information : Most citizens have no need for a home ECG machine that transmits to a doc. If your clinical condition is such that you ECG is likely or expected to change, and early recognition is important, then this may be a good investment for you. ...Read more

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I have chest pain more on swallowing, 12 lead ecg. Small Q waves in inferior leads plus v5 and 6, what could be wrong?

I have chest pain more on swallowing, 12 lead ecg. Small Q waves in inferior leads  plus v5 and 6, what could be wrong?

Chest pain: It appears you are already under care of a physician having had an ekg done. If you have q waves, it may indicate old myocardial infarction. But we have to take into account your symptoms, your risk factors before deciding on further testing like a nuclear stress test, or a cardiac cath. Your primary care physician or cardiologist would be able to guide you ...Read more

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My 17year old son just had a 12 lead ECG done it showed t wave inversions in ii, iii, avf & v4. Could the barium from an ugi series cause this?

Nonspecific: T wave inversion may be part of a normal ekg and has to interpreted by a doctor. Inverted t wave is normal in iii and sometimes other leads without meaning anything alarming. Have the doctor let you know what they think. The ekg interpretation can change with age as well so you need expertise to read them at this age. ...Read more

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I have a heart check pen that reads single lead ecg. Keeps saying wide QRS/IVCD. What's that mean? A 12 lead I had a month ago didn't say that.

I have a heart check pen that reads single lead ecg. Keeps saying wide QRS/IVCD. What's that mean? A 12 lead I had a month ago didn't say that.

False reading?: Since your EKG recently was normal it's quite possible your "heart check pen" is giving you a false reading. IVCD refers to intra-ventricular conduction delay. The AV node initiates a wave of depolarization that travels down the bundle of HIS which, in turn, divides into the left and right bundle. A partial or complete block of one of these branches causes a delay in contraction and a wide QRS. ...Read more