DCM Numbers to Know


A number including and between 55-65% represents a normal ejection fraction. The ejection fraction is the percentage of volume of blood that is pumped out of the heart with each heartbeat. A normal heart empties between 55% to 65% of its blood volume with each heartbeat.

  • 50%-55% represents borderline low ejection fraction
  • 40%-50% represents mildly reduced ejection fraction
  • 30%-40% represents moderately reduced ejection fraction
  • Less than 30% represents severely reduced ejection fraction


This is the normal heart rate (pulse) range when not exercising. Some people can have a normal heart rate in the 50’s and even 40’s. Sustained non-exercise heart rates above 100 are always abnormal in an adult.

1 in 250

One person for every 250 has been estimated to have DCM.


The percentage of people with DCM for whom a genetic cause can be clearly identified.

20% to 30%

The percentage of people with DCM who have at least one other family member with evidence of DCM.


The fraction of DCM inherited as an autosomal dominant trait. “Autosomal dominant” is a genetic term meaning that there is 50% chance of inheriting the genetic abnormality that leads to DCM.


Any top number of 130 or more and any bottom number or 80 or more represents hypertension or high blood pressure.


The number of different genes that have been identified to cause DCM.


Normal Body Mass Index (BMI), which represents normal weight


BMIs in the overweight range

30 and greater

BMIs representing obesity