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2. Heart block - Wikipedia

   en.wikipedia.org/wiki/Heart_block

   Heart block should not be confused with other conditions, which may or may not be co-occurring, relating to the heart and/or other nearby organs that are or can be serious, including angina (heart-related chest pain), heart attack (myocardial infarction), any type of heart failure, cardiogenic shock or other types of shock, different types of ...

3. Atrioventricular block - Wikipedia

   en.wikipedia.org/wiki/Atrioventricular_block

   Atrioventricular block (AV block) is a type of heart block that occurs when the electrical signal traveling from the atria, or the upper chambers of the heart, to ventricles, or the lower chambers of the heart, is impaired.

4. Left bundle branch block - Wikipedia

   en.wikipedia.org/wiki/Left_bundle_branch_block

   Left bundle branch block (LBBB) is a conduction abnormality in the heart that can be seen on an electrocardiogram (ECG). [1] In this condition, activation of the left ventricle of the heart is delayed, which causes the left ventricle to contract later than the right ventricle .

5. First-degree atrioventricular block - Wikipedia

   en.wikipedia.org/wiki/First-degree_atrio...

   First-degree heart block does not require any particular investigations except for electrolyte and drug screens, especially if an overdose is suspected. [5] In comparison to second-degree atrioventricular block, in first-degree block there is an absence of non-conduction or "dropped beats."

6. What’s the Difference Between a Normal and Dangerous Heart Rate?

   www.aol.com/difference-between-normal-dangerous...

   A “normal heart rate” for adults ranges from 60-100 beats per minute (bpm), says Brett Victor, M.D., F.A.C.C., cardiologist at Cardiology Consultants of Philadelphia. However, oftentimes lower ...

7. Right bundle branch block - Wikipedia

   en.wikipedia.org/wiki/Right_bundle_branch_block

   The criteria to diagnose a right bundle branch block on the electrocardiogram: The heart rhythm must originate above the ventricles (i.e., sinoatrial node, atria or atrioventricular node) to activate the conduction system at the correct point. The QRS duration must be more than 100 ms (incomplete block) or more than 120 ms (complete block). [9]

8. Bundle branch block - Wikipedia

   en.wikipedia.org/wiki/Bundle_branch_block

   A right bundle branch block typically causes prolongation of the last part of the QRS complex and may shift the heart's electrical axis slightly to the right. The ECG will show a terminal R wave in lead V1 and a slurred S wave in lead I. Left bundle branch block widens the entire QRS, and in most cases shifts the heart's electrical axis to the ...

9. An alarming number of adults in the U.S. are at risk of heart ...

   www.aol.com/news/surprisingly-high-number-adults...

   Nearly 90% of adults over age 20 in the United States are at risk of developing heart disease, an alarming new study suggests.. While the unexpectedly high number doesn't mean that the majority of ...