1 A pacemaker is a small device that's placed in the chest or abdomen to help control abnormal heart rhythms. 2  This device uses low-energy electrical pulses to prompt the heart to beat at a normal rate. 3  Pacemakers are used to treat arrhythmias.
DEFINITION of 'Material Participation Test'. A set of criteria that determines whether a taxpayer is a material participant in a business venture.The material participation test will determine whether business income received by the taxpayer is active or passive.According to the IRS, if the taxpayer participates in a business activity on a regular, continuous and substantial basis, then the taxpayer materially participates in the business.Next Up.EFINITION of 'Material Participation Test'. A set of criteria that determines whether a taxpayer is a material participant in a business venture.
Material participation tests. You materially participated in a trade or business activity for a tax year if you satisfy any of the following tests. 1  You participated in the activity for more than 500 hours.ou did not materially participate in the activity under test (7) if you participated in the activity for 100 hours or less during the year. Your participation in managing the activity does not count in determining whether you materially participated under this test if: