(Redirected from LBBB). Left bundle branch block (LBBB) is a cardiac conduction abnormality seen on the electrocardiogram (ECG). In this condition, activation of the left ventricle is delayed, which causes the left ventricle to contract later than the right ventricle.
For instance, in the winter, if you set the thermostat to 20Â°C (68Â°F), it will activate the heating system when the house temperature drops below 20Â°C and will shut the system off when the house air warms up past 20Â°C. A setback thermostat contains an electronic clock.
For instance, we might set one floor with a temp of 68 for active periods and 62 for inactive. The other floor may be set for 66 and 60. Our thermostats are 4 cycle units so we set a morning high temp that goes to the lower temp just before the last person leaves the house.