Slow Heartbeat. Slow heartbeat (heart rate), called bradycardia, is an arrhythmia, or disorder of the heartâs rhythm. Each day, a normal heart beats about 100,000 times, at a rate anyÂ­where from 60 to 100 times a minute. Changes in heart rate caused by activity, diet, medications, and age are normal and common. Tachy-brady syndromeâ It is possible for the same person to have a slow heartbeat when the heart is in normal rhythm and periods of fast, irregular heartbeats (supraventricular tachycardias) at other times. 2  Sometimes, medications needed to control the fast heart rate can worsen the already slow heart rate.
They should be 40 to 50 feet away from all other trees. Allow an additional 15 to 20 feet between the live oak and your home, driveway or any other structure. This allows for roots that may extend beyond the adult tree's canopy.
Spacing between species within rows is also important to ensure that the shelterbelt fills out nicely and becomes an effective windbreak. The spacing between shrubs in the outside row should generally be about 3 feet (1m), with caragana being an exception that should be planted about 1 foot (0.3m) apart. Spacing of about 8 feet (2.5m) between trees within the 2nd and 3rd rows is appropriate. Trees within the 4th and 5th rows should be spaced about 10 feet (3.0m) apart. Now that you have planned your shelterbelt the next step is to order your trees and arrange a planting day.