(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.
If you like your home cooler at night, set your thermostat to a lower setting about an hour before you actually go to bed so the house starts to cool down. Prior to waking up, you might want to set the thermostat so the heat comes on approximately two hours before you actually get up so the house is nice and warm.