The LHC medical abbreviation stands for left heart catheterization, a procedure in which a thin tube is guided through an artery in the wrist or groin up to the left side of the heart. Dye injected through it shows the coronary arteries on X ray, and pressure readings show how the main pumping chamber is working.
LHC appears in cardiology notes, cath lab reports and discharge summaries, often next to findings about blockages or a stent. It is frequently the step right before a PCI. Below you will find what happens during the test, how to read a short report, and how it differs from a right heart catheterization.
At a glance
Stands for
Left heart catheterizationAlso called
Cardiac cath, coronary angiogramUsed in
Cardiology, cath labAccess sites
Radial artery (wrist) or femoral artery (groin)Do not confuse with
RHC, right heart catheterization of the veins and lungsOften leads to
What happens during an LHC
The person is usually awake but given medicine to relax, with numbing at the access site. The cardiologist places a short sheath in the artery, then threads a catheter to the openings of the coronary arteries. Contrast dye is injected while X ray video records the flow, revealing any narrowing.
The catheter can also cross into the left ventricle to measure pressures, including LVEDP, the pressure at the end of filling. A dye injection into the ventricle, called a ventriculogram, may estimate how strongly it squeezes. Afterward, the sheath comes out and pressure or a closure device stops bleeding at the site.
Why doctors order a left heart cath
Common reasons include chest pain that suggests blocked arteries, an abnormal stress test, a heart attack such as an MI, new heart failure, and planning for valve surgery. The test confirms or rules out CAD and shows where any blockage sits and how severe it is.
In an emergency heart attack, LHC and treatment happen together within minutes of arrival. For planned cases, it is scheduled after other tests such as an EKG and echocardiogram point toward a problem.
LHC medical abbreviation in a cath report
Cath reports are dense. Here is one short line broken down.
| Report text | Meaning |
|---|---|
| LHC via R radial | Left heart cath done through the right wrist artery |
| 90% mid LAD stenosis | The middle of the LAD artery is narrowed by about 90 percent |
| DES x1 placed | One drug eluting stent was put in |
| LVEDP 18 | Filling pressure in the left ventricle, in mmHg |
| TR band applied | A wristband device is compressing the access site |
Nurse handoff after the procedure: "Back from LHC, right groin, bed rest per protocol, check site and pedal pulses." Groin access usually means a period lying flat and frequent checks of the leg, while wrist access usually lets people sit up sooner.
LHC versus RHC and other cath lab shorthand
| Shorthand | What it does |
|---|---|
| LHC | Arterial access, coronary images and left heart pressures |
| RHC | Venous access, measures pressures in the right heart and lung arteries |
| R and LHC | Both done in the same session |
| PCI | Treatment that opens a blockage with a balloon or stent |
| PTCA | Opening a coronary artery with a balloon |
LHC on its own is a diagnostic test. If a blockage needs treatment, PCI often follows during the same visit, which is why reports may read LHC with PCI.
Recovery notes and things to watch
Most planned cases go home the same day or the next morning. Discharge papers commonly describe care of the puncture site, limits on lifting with the affected arm or leg for a short time, and when to call about bleeding, swelling, coldness or numbness in the limb. People who received a stent are often started on two antiplatelet medicines, written DAPT.
Kidney function may be checked because contrast dye can strain the kidneys. The exact instructions come from the cardiology team and differ by hospital.
For students and scribes
When documenting, record the access site, the findings in each major artery, any intervention, the closure method and the post procedure checks. Cath and stent shorthand also appears in the surgical abbreviations guide.
Everything above describes the term and test broadly. For questions about your own catheterization or recovery, check with your cardiologist or cath lab nurse.
Frequently asked questions
What does LHC mean in cardiology?
It means left heart catheterization, a test that images the coronary arteries with dye and measures pressure in the left side of the heart. It is often called a cardiac cath or coronary angiogram.
Is an LHC the same as getting a stent?
No. LHC is the diagnostic test. A stent is placed during PCI, which may happen in the same session if the LHC shows a blockage that needs treatment.
What is the difference between LHC and RHC?
LHC goes through an artery to look at the coronary arteries and left heart. RHC goes through a vein to measure pressures in the right heart and lung arteries.
How long does a left heart cath take?
The procedure itself often takes under an hour, though preparation and recovery add several hours. If treatment is done at the same time, it can take longer.