The Merck Manual - A detailed look at non-invasive procedures and invasive procedures used in diagnosing heart disease.

Virtual Hospital - A brief look at what an echocardiogram is, what happens in the echo lab and considerations.

Treadmill Electrocardiogram -Stress EKG - Virtual Hospital: Explains what it is, in the echo lab, the test and considerations.

UCLA Heart Workup Program - Discussion about the electron beam computerized tomography (EBCT) which is used to perform coronary artery calcium screening for asymptomatic patients at risk for heart disease.

Cardiac Catheterization - In-depth explanation of this procedure and the symptoms experienced during, what happens after, what to watch out for and how to prepare.

University of Kansas Medical Center - Six still echocardiogram samples are shown here and one full motion. Aortic and mitral valve.

Torrance Memorial Medical Center - Explains what an echocardiogram is, why it is done and how to prepare.

Electrocardiogram - Explains what an EKG or ECG is, why it is done and what preparation is needed.

Electropyhsiology Study - Explanation of what a EPS is, why it is done, the procedure, what you may feel while it is being done, what happens after and what to watch for.

Holter Monitor - What it is and why it is done, what to expect after it is put on and preparation is discussed.

Nuclear Medicine Treadmill Stress Tests : Cardiolite or Thallium - Explanation as to what this test is and why it is done. Preparation is also covered.

IV Persantine-Thallium Stress Test :IVP - What this test is and why it is needed and preparations are discussed.

Transesophageal Echocardiogram - What this test is, why it is done, preparation and what happens after, are also discussed.

Stress Echocardiogram - Discussion as to what this test is, why it is done and preparation needed.

Treadmill Stress Test - Preparation, the test and why it is done is discussed.

HeartScan - Information on Electron Beam CT Scanning that can detect coronary artery disease in its earliest, most treatable stages. At Abbott Northwestern Hospital/Minneapolis Heart Institute.

Hall-Garcia Cardiology Associates: EPS - An introduction to electrophysiology studies, the study itself, what happens after and going home.

Radiology Info: MRI Cardiovascular - Patient information about magnetic resonance imaging of the heart and blood vessels. Learn what someone might experience, how to prepare for exams, benefits versus risks and more topics of interest.

UMDNJ: Echocardiography - Medical articles and ultrasound images intended for use by doctors and health care professionals.

12-lead ECG Library - A collection of electrocardiograms for all those interested in learning about the ECG / EKG.

COHIS - What an echocardiogram is, what it is used for, how it is done and some examples are shown here.

Electrocardiogram - What it is, what it is used for and how it is done is discussed here.

Stress Test - An explanation of what it is and what it is used for.

Holter Monitor - What it is, what it is used for and how it is done and used.

Community Outreach Health Information System - An explanation of what angiography is and what it is used for.

Transesophageal Echocardiogram - Explains how a TEE is different from the standard echo,how it is performed, how to prepare for the test, how long it takes, safety, the information it provides, how long it takes for the results and some images of a TEE are shown.

Pacific Medical Centre - A look at echocardiogram and transesophageal echocardiography, the purpose, time they take, risks and preparations.

On Health with WebMD - A complete look at an echocardiogram and transesophageal echocardiogram.

Tests to Detect Coronary Artery Disease - Topics include electrocardiogram also called the EKG or ECG and catheterization.

Tests to Diagnose Coronary Disease - Stress EKG, echocardiography, CT scan, MRI scan and PET scan are discussed.

Cardiology Channel - Description of cardiac catheterization is, who should have it and possible risks.

Regular Treadmill Stress Test - How it works, when it is ordered, how it is done, preparations, how long it takes, safety, reliability and how quickly you get results are discussed.

Heart Site: Echocardiogram - Explains what ultrasound is, what doppler is, the information it provides, how long it takes, safety, and how quick the results are obtained and what they mean.

Heart Info: Patient Guide - Provides listings of useful information and advice related to cardiac disorders, tests, surgical procedures and associated signs and symptoms.

Guidelines for Clinical Intracardiac Electrophysiological and Catheter Ablation Procedures - A report of the American College of Cardiology and American Heart Association Task Force on Practice Guidelines.

Mary Greeley Medical Center - CardioScore - Details about a heart attack prevention service.

American Heart Association - Looks at heart damage detection, tests to diagnose heart disease, cardiac catheterization, ambulatory electocardiography, arteriography, exercise stress test and thallium stress testing to name a few.

Heart Encyclopedia: Diagnostic Methods - The Cincinnati Children's Hospital, located in Ohio, presents information about available methods to determine if a child has a cardiac problem.