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Tutorial Instructions

Searchable Questions

About MEDLINE

Keyword/Textword

Searching

Medical Subject Headings

Overview 1

Mapping

Subheadings

MeSH Tree

Explode

Focus

Combining (AND, OR)

Combining Overview

Limiting

Displaying Results

Full Text Articles

Printing/E-Mailing/Saving

Ordering Articles
MeSH TREE
Screen 1 of 1

This is the Tree Display. It shows the heirarchy of medical subjects and where your subject appears in relation to the heirarchy.

When you click on CONTEXTS or scroll down the screen, you will see the tree structure for your search term.

Notice that Heart Diseases appears under the broader heading Cardiovascular Diseases which itself is found under the Diseases (Non MeSH) heading.

Tree
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Tree for Heart Diseases
Database: Ovid MEDLINE(R)

Scroll down for highlighted search term.

Select Term(s)Subject Heading Hits  Explode  Focus  Scope Note 
  Anatomy (Non MeSH)      
  Organisms (Non MeSH)      
  Diseases (Non MeSH)      
 Bacterial Infections and Mycoses0
 Virus Diseases5599
 Parasitic Diseases1186
 Neoplasms58398
 Musculoskeletal Diseases3066
 Digestive System Diseases865
 Stomatognathic Diseases146
 Respiratory Tract Diseases3367
 Otorhinolaryngologic Diseases784
 Nervous System Diseases7170
 Eye Diseases4229
 Urologic and Male Genital Diseases0
 Female Genital Diseases and Pregnancy Complications0
 Cardiovascular Diseases25394
  Cardiovascular Abnormalities299
 

The heart diseases Tree display is highlighted below.

The MeSH terms (e.g. Arrhythmia) that are indented under "heart diseases" are subjects that are related to heart diseases and may indicate more specific forms of heart disease. Each of these related subjects are themselves independent MeSH terms and may be searched separately.

Notice the numbers that appear next to each MeSH term. These indicate the numbers of articles that are indexed to each individual MeSH term.

These related subjects will not automatically be included in your search of Heart Diseases. If you would like to expand your search to include these more specific instances of heart disease you will need to click on the EXPLODE box next to heart diseases (recommended), the search will then automatically incorporate into our search all of the related terms (those that are indented) in the tree.

    Explode  
    Heart Diseases10511
   Arrhythmia7978
    Carcinoid Heart Disease88
    Cardiac Output, High49
    Cardiac Output, Low2146
    Cardiac Tamponade1189
   Cardiomegaly2927
   Cardiomyopathies4497
   Endocarditis929
    Heart Aneurysm1002
   Heart Arrest4833
   Heart Defects, Congenital7709
   Heart Failure, Congestive20502
    Heart Neoplasms2909
   Heart Rupture243
   Heart Valve Diseases3623
   Myocardial Ischemia14591
    Pericardial Effusion1562
   Pericarditis947
    Pneumopericardium142
    Postpericardiotomy Syndrome43
    Pulmonary Heart Disease309
    Rheumatic Heart Disease985
   Ventricular Dysfunction506
    Ventricular Outflow Obstruction880
   Hyperemia1098
  Pregnancy Complications, Cardiovascular3198
   Scimitar Syndrome91
   Syphilis, Cardiovascular50
  Tuberculosis, Cardiovascular58
  Vascular Diseases4295
 Hemic and Lymphatic Diseases0

The next tutorial pages will cover Explode and Focus in more depth.