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Heart rate increases in tilt test.
Newby DE, Flint LL, El Hag O. Newby DE, et al. Among authors: el hag o. Circulation. 1998 Jul 14;98(2):187-8. Circulation. 1998. PMID: 9679729 No abstract available.
Head-up tilt testing. The balance of evidence.
Hargreaves AD, el Hag O, Boon NA. Hargreaves AD, et al. Among authors: el hag o. Br Heart J. 1994 Sep;72(3):216-7. doi: 10.1136/hrt.72.3.216. Br Heart J. 1994. PMID: 7946767 Free PMC article. No abstract available.