char = H;code = 72 char = i;code = 105 char = g;code = 103 char = h;code = 104 char = ;code = 32 char = a;code = 97 char = l;code = 108 char = t;code = 116 char = i;code = 105 char = t;code = 116 char = u;code = 117 char = d;code = 100 char = e;code = 101 char = ;code = 32 char = s;code = 115 char = t;code = 116 char = r;code = 114 char = e;code = 101 char = s;code = 115 char = s;code = 115 char = ;code = 32 char = a;code = 97 char = n;code = 110 char = d;code = 100 char = ;code = 32 char = r;code = 114 char = e;code = 101 char = t;code = 116 char = i;code = 105 char = n;code = 110 char = a;code = 97 char = l;code = 108 char = ;code = 32 char = h;code = 104 char = e;code = 101 char = m;code = 109 char = o;code = 111 char = r;code = 114 char = r;code = 114 char = h;code = 104 char = a;code = 97 char = g;code = 103 char = e;code = 101 char = :;code = 58 char = ;code = 32 char = r;code = 114 char = e;code = 101 char = l;code = 108 char = a;code = 97 char = t;code = 116 char = i;code = 105 char = o;code = 111 char = n;code = 110 char = ;code = 32 char = t;code = 116 char = o;code = 111 char = ;code = 32 char = v;code = 118 char = a;code = 97 char = s;code = 115 char = c;code = 99 char = u;code = 117 char = l;code = 108 char = a;code = 97 char = r;code = 114 char = ;code = 32 char = h;code = 104 char = e;code = 101 char = a;code = 97 char = d;code = 100 char = a;code = 97 char = c;code = 99 char = h;code = 104 char = e;code = 101 char = ;code = 32 char = m;code = 109 char = e;code = 101 char = c;code = 99 char = h;code = 104 char = a;code = 97 char = n;code = 110 char = i;code = 105 char = s;code = 115 char = m;code = 109 char = s;code = 115 char = .;code = 46 result sql = High altitude stress and retinal hemorrhage: relation to vascular headache mechanisms.
High altitude stress and retinal hemorrhage: relation to vascular headache mechanisms.char = R;code = 82 char = e;code = 101 char = t;code = 116 char = i;code = 105 char = n;code = 110 char = a;code = 97 char = l;code = 108 char = ;code = 32 char = h;code = 104 char = e;code = 101 char = m;code = 109 char = o;code = 111 char = r;code = 114 char = r;code = 114 char = h;code = 104 char = a;code = 97 char = g;code = 103 char = e;code = 101 char = ;code = 32 char = o;code = 111 char = c;code = 99 char = c;code = 99 char = u;code = 117 char = r;code = 114 char = r;code = 114 char = e;code = 101 char = d;code = 100 char = ;code = 32 char = i;code = 105 char = n;code = 110 char = ;code = 32 char = 3;code = 51 char = 6;code = 54 char = %;code = 37 char = ;code = 32 char = o;code = 111 char = f;code = 102 char = ;code = 32 char = 3;code = 51 char = 9;code = 57 char = ;code = 32 char = s;code = 115 char = u;code = 117 char = b;code = 98 char = j;code = 106 char = e;code = 101 char = c;code = 99 char = t;code = 116 char = s;code = 115 char = ;code = 32 char = e;code = 101 char = x;code = 120 char = p;code = 112 char = o;code = 111 char = s;code = 115 char = e;code = 101 char = d;code = 100 char = ;code = 32 char = t;code = 116 char = o;code = 111 char = ;code = 32 char = a;code = 97 char = l;code = 108 char = t;code = 116 char = i;code = 105 char = t;code = 116 char = u;code = 117 char = d;code = 100 char = e;code = 101 char = s;code = 115 char = ;code = 32 char = a;code = 97 char = t;code = 116 char = ;code = 32 char = o;code = 111 char = r;code = 114 char = ;code = 32 char = a;code = 97 char = b;code = 98 char = o;code = 111 char = v;code = 118 char = e;code = 101 char = ;code = 32 char = 1;code = 49 char = 4;code = 52 char = ,;code = 44 char = 2;code = 50 char = 0;code = 48 char = 0;code = 48 char = ;code = 32 char = f;code = 102 char = e;code = 101 char = e;code = 101 char = t;code = 116 char = .;code = 46 char = ;code = 32 char = I;code = 73 char = n;code = 110 char = ;code = 32 char = s;code = 115 char = u;code = 117 char = b;code = 98 char = j;code = 106 char = e;code = 101 char = c;code = 99 char = t;code = 116 char = s;code = 115 char = ;code = 32 char = w;code = 119 char = i;code = 105 char = t;code = 116 char = h;code = 104 char = ;code = 32 char = a;code = 97 char = ;code = 32 char = h;code = 104 char = i;code = 105 char = s;code = 115 char = t;code = 116 char = o;code = 111 char = r;code = 114 char = y;code = 121 char = ;code = 32 char = o;code = 111 char = f;code = 102 char = ;code = 32 char = v;code = 118 char = a;code = 97 char = s;code = 115 char = c;code = 99 char = u;code = 117 char = l;code = 108 char = a;code = 97 char = r;code = 114 char = ;code = 32 char = h;code = 104 char = e;code = 101 char = a;code = 97 char = d;code = 100 char = a;code = 97 char = c;code = 99 char = h;code = 104 char = e;code = 101 char = s;code = 115 char = ;code = 32 char = a;code = 97 char = t;code = 116 char = ;code = 32 char = s;code = 115 char = e;code = 101 char = a;code = 97 char = ;code = 32 char = l;code = 108 char = e;code = 101 char = v;code = 118 char = e;code = 101 char = l;code = 108 char = ,;code = 44 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = e;code = 101 char = r;code = 114 char = e;code = 101 char = ;code = 32 char = w;code = 119 char = a;code = 97 char = s;code = 115 char = ;code = 32 char = a;code = 97 char = ;code = 32 char = h;code = 104 char = i;code = 105 char = g;code = 103 char = h;code = 104 char = e;code = 101 char = r;code = 114 char = ;code = 32 char = i;code = 105 char = n;code = 110 char = c;code = 99 char = i;code = 105 char = d;code = 100 char = e;code = 101 char = n;code = 110 char = c;code = 99 char = e;code = 101 char = ;code = 32 char = o;code = 111 char = f;code = 102 char = ;code = 32 char = a;code = 97 char = n;code = 110 char = d;code = 100 char = ;code = 32 char = m;code = 109 char = o;code = 111 char = r;code = 114 char = e;code = 101 char = ;code = 32 char = s;code = 115 char = e;code = 101 char = v;code = 118 char = e;code = 101 char = r;code = 114 char = e;code = 101 char = ;code = 32 char = a;code = 97 char = l;code = 108 char = t;code = 116 char = i;code = 105 char = t;code = 116 char = u;code = 117 char = d;code = 100 char = e;code = 101 char = ;code = 32 char = h;code = 104 char = e;code = 101 char = a;code = 97 char = d;code = 100 char = a;code = 97 char = c;code = 99 char = h;code = 104 char = e;code = 101 char = ,;code = 44 char = ;code = 32 char = a;code = 97 char = s;code = 115 char = ;code = 32 char = w;code = 119 char = e;code = 101 char = l;code = 108 char = l;code = 108 char = ;code = 32 char = a;code = 97 char = s;code = 115 char = ;code = 32 char = a;code = 97 char = ;code = 32 char = h;code = 104 char = i;code = 105 char = g;code = 103 char = h;code = 104 char = e;code = 101 char = r;code = 114 char = ;code = 32 char = i;code = 105 char = n;code = 110 char = c;code = 99 char = i;code = 105 char = d;code = 100 char = e;code = 101 char = n;code = 110 char = c;code = 99 char = e;code = 101 char = ;code = 32 char = o;code = 111 char = f;code = 102 char = ;code = 32 char = r;code = 114 char = e;code = 101 char = t;code = 116 char = i;code = 105 char = n;code = 110 char = a;code = 97 char = l;code = 108 char = ;code = 32 char = h;code = 104 char = e;code = 101 char = m;code = 109 char = o;code = 111 char = r;code = 114 char = r;code = 114 char = h;code = 104 char = a;code = 97 char = g;code = 103 char = e;code = 101 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = a;code = 97 char = n;code = 110 char = ;code = 32 char = a;code = 97 char = m;code = 109 char = o;code = 111 char = n;code = 110 char = g;code = 103 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = o;code = 111 char = s;code = 115 char = e;code = 101 char = ;code = 32 char = p;code = 112 char = r;code = 114 char = e;code = 101 char = v;code = 118 char = i;code = 105 char = o;code = 111 char = u;code = 117 char = s;code = 115 char = l;code = 108 char = y;code = 121 char = ;code = 32 char = h;code = 104 char = e;code = 101 char = a;code = 97 char = d;code = 100 char = a;code = 97 char = c;code = 99 char = h;code = 104 char = e;code = 101 char = -;code = 45 char = f;code = 102 char = r;code = 114 char = e;code = 101 char = e;code = 101 char = .;code = 46 char = ;code = 32 char = I;code = 73 char = n;code = 110 char = ;code = 32 char = s;code = 115 char = u;code = 117 char = b;code = 98 char = j;code = 106 char = e;code = 101 char = c;code = 99 char = t;code = 116 char = s;code = 115 char = ;code = 32 char = w;code = 119 char = i;code = 105 char = t;code = 116 char = h;code = 104 char = o;code = 111 char = u;code = 117 char = t;code = 116 char = ;code = 32 char = a;code = 97 char = l;code = 108 char = t;code = 116 char = i;code = 105 char = t;code = 116 char = u;code = 117 char = d;code = 100 char = e;code = 101 char = ;code = 32 char = h;code = 104 char = e;code = 101 char = a;code = 97 char = d;code = 100 char = a;code = 97 char = c;code = 99 char = h;code = 104 char = e;code = 101 char = ,;code = 44 char = ;code = 32 char = n;code = 110 char = o;code = 111 char = n;code = 110 char = e;code = 101 char = ;code = 32 char = h;code = 104 char = a;code = 97 char = d;code = 100 char = ;code = 32 char = r;code = 114 char = e;code = 101 char = t;code = 116 char = i;code = 105 char = n;code = 110 char = a;code = 97 char = l;code = 108 char = ;code = 32 char = h;code = 104 char = e;code = 101 char = m;code = 109 char = o;code = 111 char = r;code = 114 char = r;code = 114 char = h;code = 104 char = a;code = 97 char = g;code = 103 char = e;code = 101 char = .;code = 46 char = ;code = 32 char = I;code = 73 char = n;code = 110 char = ;code = 32 char = s;code = 115 char = u;code = 117 char = b;code = 98 char = j;code = 106 char = e;code = 101 char = c;code = 99 char = t;code = 116 char = s;code = 115 char = ;code = 32 char = w;code = 119 char = i;code = 105 char = t;code = 116 char = h;code = 104 char = ;code = 32 char = a;code = 97 char = l;code = 108 char = t;code = 116 char = i;code = 105 char = t;code = 116 char = u;code = 117 char = d;code = 100 char = e;code = 101 char = ;code = 32 char = h;code = 104 char = e;code = 101 char = a;code = 97 char = d;code = 100 char = a;code = 97 char = c;code = 99 char = h;code = 104 char = e;code = 101 char = ,;code = 44 char = ;code = 32 char = 4;code = 52 char = 2;code = 50 char = %;code = 37 char = ;code = 32 char = h;code = 104 char = a;code = 97 char = d;code = 100 char = ;code = 32 char = r;code = 114 char = e;code = 101 char = t;code = 116 char = i;code = 105 char = n;code = 110 char = a;code = 97 char = l;code = 108 char = ;code = 32 char = h;code = 104 char = e;code = 101 char = m;code = 109 char = o;code = 111 char = r;code = 114 char = r;code = 114 char = h;code = 104 char = a;code = 97 char = g;code = 103 char = e;code = 101 char = .;code = 46 char = ;code = 32 char = A;code = 65 char = ;code = 32 char = p;code = 112 char = r;code = 114 char = o;code = 111 char = g;code = 103 char = r;code = 114 char = e;code = 101 char = s;code = 115 char = s;code = 115 char = i;code = 105 char = v;code = 118 char = e;code = 101 char = ;code = 32 char = r;code = 114 char = i;code = 105 char = s;code = 115 char = e;code = 101 char = ;code = 32 char = i;code = 105 char = n;code = 110 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = e;code = 101 char = ;code = 32 char = i;code = 105 char = n;code = 110 char = c;code = 99 char = i;code = 105 char = d;code = 100 char = e;code = 101 char = n;code = 110 char = c;code = 99 char = e;code = 101 char = ;code = 32 char = o;code = 111 char = f;code = 102 char = ;code = 32 char = r;code = 114 char = e;code = 101 char = t;code = 116 char = i;code = 105 char = n;code = 110 char = a;code = 97 char = l;code = 108 char = ;code = 32 char = h;code = 104 char = e;code = 101 char = m;code = 109 char = o;code = 111 char = r;code = 114 char = r;code = 114 char = h;code = 104 char = a;code = 97 char = g;code = 103 char = e;code = 101 char = ;code = 32 char = w;code = 119 char = a;code = 97 char = s;code = 115 char = ;code = 32 char = c;code = 99 char = o;code = 111 char = r;code = 114 char = r;code = 114 char = e;code = 101 char = l;code = 108 char = a;code = 97 char = t;code = 116 char = e;code = 101 char = d;code = 100 char = ;code = 32 char = w;code = 119 char = i;code = 105 char = t;code = 116 char = h;code = 104 char = ;code = 32 char = p;code = 112 char = r;code = 114 char = o;code = 111 char = g;code = 103 char = r;code = 114 char = e;code = 101 char = s;code = 115 char = s;code = 115 char = i;code = 105 char = v;code = 118 char = e;code = 101 char = l;code = 108 char = y;code = 121 char = ;code = 32 char = g;code = 103 char = r;code = 114 char = e;code = 101 char = a;code = 97 char = t;code = 116 char = e;code = 101 char = r;code = 114 char = ;code = 32 char = i;code = 105 char = n;code = 110 char = t;code = 116 char = e;code = 101 char = n;code = 110 char = s;code = 115 char = i;code = 105 char = t;code = 116 char = y;code = 121 char = ;code = 32 char = o;code = 111 char = f;code = 102 char = ;code = 32 char = a;code = 97 char = l;code = 108 char = t;code = 116 char = i;code = 105 char = t;code = 116 char = u;code = 117 char = d;code = 100 char = e;code = 101 char = ;code = 32 char = h;code = 104 char = e;code = 101 char = a;code = 97 char = d;code = 100 char = a;code = 97 char = c;code = 99 char = h;code = 104 char = e;code = 101 char = .;code = 46 char = ;code = 32 char = F;code = 70 char = a;code = 97 char = c;code = 99 char = t;code = 116 char = o;code = 111 char = r;code = 114 char = s;code = 115 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = a;code = 97 char = t;code = 116 char = ;code = 32 char = i;code = 105 char = n;code = 110 char = t;code = 116 char = e;code = 101 char = n;code = 110 char = s;code = 115 char = i;code = 105 char = f;code = 102 char = i;code = 105 char = e;code = 101 char = d;code = 100 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = e;code = 101 char = ;code = 32 char = r;code = 114 char = a;code = 97 char = t;code = 116 char = e;code = 101 char = ;code = 32 char = o;code = 111 char = r;code = 114 char = ;code = 32 char = d;code = 100 char = e;code = 101 char = g;code = 103 char = r;code = 114 char = e;code = 101 char = e;code = 101 char = ;code = 32 char = o;code = 111 char = f;code = 102 char = ;code = 32 char = e;code = 101 char = x;code = 120 char = p;code = 112 char = o;code = 111 char = s;code = 115 char = u;code = 117 char = r;code = 114 char = e;code = 101 char = ,;code = 44 char = ;code = 32 char = i;code = 105 char = n;code = 110 char = c;code = 99 char = l;code = 108 char = u;code = 117 char = d;code = 100 char = i;code = 105 char = n;code = 110 char = g;code = 103 char = ;code = 32 char = r;code = 114 char = a;code = 97 char = p;code = 112 char = i;code = 105 char = d;code = 100 char = ;code = 32 char = a;code = 97 char = s;code = 115 char = c;code = 99 char = e;code = 101 char = n;code = 110 char = t;code = 116 char = ;code = 32 char = a;code = 97 char = n;code = 110 char = d;code = 100 char = ;code = 32 char = s;code = 115 char = t;code = 116 char = r;code = 114 char = e;code = 101 char = n;code = 110 char = u;code = 117 char = o;code = 111 char = u;code = 117 char = s;code = 115 char = ;code = 32 char = e;code = 101 char = x;code = 120 char = e;code = 101 char = r;code = 114 char = t;code = 116 char = i;code = 105 char = o;code = 111 char = n;code = 110 char = ,;code = 44 char = ;code = 32 char = a;code = 97 char = p;code = 112 char = p;code = 112 char = e;code = 101 char = a;code = 97 char = r;code = 114 char = e;code = 101 char = d;code = 100 char = ;code = 32 char = t;code = 116 char = o;code = 111 char = ;code = 32 char = i;code = 105 char = n;code = 110 char = c;code = 99 char = r;code = 114 char = e;code = 101 char = a;code = 97 char = s;code = 115 char = e;code = 101 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = e;code = 101 char = ;code = 32 char = l;code = 108 char = i;code = 105 char = k;code = 107 char = e;code = 101 char = l;code = 108 char = i;code = 105 char = h;code = 104 char = o;code = 111 char = o;code = 111 char = d;code = 100 char = ;code = 32 char = o;code = 111 char = f;code = 102 char = ;code = 32 char = h;code = 104 char = e;code = 101 char = m;code = 109 char = o;code = 111 char = r;code = 114 char = r;code = 114 char = h;code = 104 char = a;code = 97 char = g;code = 103 char = e;code = 101 char = .;code = 46 char = ;code = 32 char = A;code = 65 char = n;code = 110 char = ;code = 32 char = o;code = 111 char = p;code = 112 char = t;code = 116 char = i;code = 105 char = m;code = 109 char = a;code = 97 char = l;code = 108 char = ;code = 32 char = b;code = 98 char = a;code = 97 char = l;code = 108 char = a;code = 97 char = n;code = 110 char = c;code = 99 char = e;code = 101 char = ;code = 32 char = b;code = 98 char = e;code = 101 char = t;code = 116 char = w;code = 119 char = e;code = 101 char = e;code = 101 char = n;code = 110 char = ;code = 32 char = a;code = 97 char = c;code = 99 char = c;code = 99 char = l;code = 108 char = i;code = 105 char = m;code = 109 char = a;code = 97 char = t;code = 116 char = i;code = 105 char = z;code = 122 char = a;code = 97 char = t;code = 116 char = i;code = 105 char = o;code = 111 char = n;code = 110 char = ;code = 32 char = a;code = 97 char = n;code = 110 char = d;code = 100 char = ;code = 32 char = s;code = 115 char = u;code = 117 char = b;code = 98 char = s;code = 115 char = e;code = 101 char = q;code = 113 char = u;code = 117 char = e;code = 101 char = n;code = 110 char = t;code = 116 char = ;code = 32 char = a;code = 97 char = l;code = 108 char = t;code = 116 char = i;code = 105 char = t;code = 116 char = u;code = 117 char = d;code = 100 char = e;code = 101 char = ;code = 32 char = s;code = 115 char = t;code = 116 char = r;code = 114 char = e;code = 101 char = s;code = 115 char = s;code = 115 char = ;code = 32 char = a;code = 97 char = p;code = 112 char = p;code = 112 char = e;code = 101 char = a;code = 97 char = r;code = 114 char = e;code = 101 char = d;code = 100 char = ;code = 32 char = t;code = 116 char = o;code = 111 char = ;code = 32 char = p;code = 112 char = r;code = 114 char = e;code = 101 char = v;code = 118 char = e;code = 101 char = n;code = 110 char = t;code = 116 char = ;code = 32 char = r;code = 114 char = e;code = 101 char = t;code = 116 char = i;code = 105 char = n;code = 110 char = a;code = 97 char = l;code = 108 char = ;code = 32 char = h;code = 104 char = e;code = 101 char = m;code = 109 char = o;code = 111 char = r;code = 114 char = r;code = 114 char = h;code = 104 char = a;code = 97 char = g;code = 103 char = e;code = 101 char = .;code = 46 char = ;code = 32 char = I;code = 73 char = n;code = 110 char = c;code = 99 char = r;code = 114 char = e;code = 101 char = a;code = 97 char = s;code = 115 char = e;code = 101 char = d;code = 100 char = ;code = 32 char = r;code = 114 char = e;code = 101 char = t;code = 116 char = i;code = 105 char = n;code = 110 char = a;code = 97 char = l;code = 108 char = ;code = 32 char = b;code = 98 char = l;code = 108 char = o;code = 111 char = o;code = 111 char = d;code = 100 char = ;code = 32 char = f;code = 102 char = l;code = 108 char = o;code = 111 char = w;code = 119 char = ,;code = 44 char = ;code = 32 char = r;code = 114 char = e;code = 101 char = t;code = 116 char = i;code = 105 char = n;code = 110 char = a;code = 97 char = l;code = 108 char = ;code = 32 char = v;code = 118 char = e;code = 101 char = s;code = 115 char = s;code = 115 char = e;code = 101 char = l;code = 108 char = ;code = 32 char = e;code = 101 char = n;code = 110 char = g;code = 103 char = o;code = 111 char = r;code = 114 char = g;code = 103 char = e;code = 101 char = m;code = 109 char = e;code = 101 char = n;code = 110 char = t;code = 116 char = ,;code = 44 char = ;code = 32 char = i;code = 105 char = n;code = 110 char = c;code = 99 char = r;code = 114 char = e;code = 101 char = a;code = 97 char = s;code = 115 char = e;code = 101 char = d;code = 100 char = ;code = 32 char = r;code = 114 char = e;code = 101 char = t;code = 116 char = i;code = 105 char = n;code = 110 char = a;code = 97 char = l;code = 108 char = ;code = 32 char = v;code = 118 char = e;code = 101 char = i;code = 105 char = n;code = 110 char = ;code = 32 char = a;code = 97 char = n;code = 110 char = d;code = 100 char = ;code = 32 char = p;code = 112 char = r;code = 114 char = e;code = 101 char = v;code = 118 char = e;code = 101 char = n;code = 110 char = o;code = 111 char = u;code = 117 char = s;code = 115 char = ;code = 32 char = c;code = 99 char = a;code = 97 char = p;code = 112 char = i;code = 105 char = l;code = 108 char = l;code = 108 char = a;code = 97 char = r;code = 114 char = y;code = 121 char = ;code = 32 char = p;code = 112 char = r;code = 114 char = e;code = 101 char = s;code = 115 char = s;code = 115 char = u;code = 117 char = r;code = 114 char = e;code = 101 char = ,;code = 44 char = ;code = 32 char = a;code = 97 char = n;code = 110 char = d;code = 100 char = ;code = 32 char = p;code = 112 char = o;code = 111 char = s;code = 115 char = s;code = 115 char = i;code = 105 char = b;code = 98 char = l;code = 108 char = y;code = 121 char = ;code = 32 char = d;code = 100 char = e;code = 101 char = c;code = 99 char = r;code = 114 char = e;code = 101 char = a;code = 97 char = s;code = 115 char = e;code = 101 char = d;code = 100 char = ;code = 32 char = i;code = 105 char = n;code = 110 char = t;code = 116 char = r;code = 114 char = a;code = 97 char = o;code = 111 char = c;code = 99 char = u;code = 117 char = l;code = 108 char = a;code = 97 char = r;code = 114 char = ;code = 32 char = p;code = 112 char = r;code = 114 char = e;code = 101 char = s;code = 115 char = s;code = 115 char = u;code = 117 char = r;code = 114 char = e;code = 101 char = ;code = 32 char = m;code = 109 char = a;code = 97 char = y;code = 121 char = ;code = 32 char = c;code = 99 char = o;code = 111 char = n;code = 110 char = t;code = 116 char = r;code = 114 char = i;code = 105 char = b;code = 98 char = u;code = 117 char = t;code = 116 char = e;code = 101 char = ;code = 32 char = t;code = 116 char = o;code = 111 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = e;code = 101 char = ;code = 32 char = p;code = 112 char = a;code = 97 char = t;code = 116 char = h;code = 104 char = o;code = 111 char = g;code = 103 char = e;code = 101 char = n;code = 110 char = e;code = 101 char = s;code = 115 char = i;code = 105 char = s;code = 115 char = ;code = 32 char = o;code = 111 char = f;code = 102 char = ;code = 32 char = r;code = 114 char = e;code = 101 char = t;code = 116 char = i;code = 105 char = n;code = 110 char = a;code = 97 char = l;code = 108 char = ;code = 32 char = h;code = 104 char = e;code = 101 char = m;code = 109 char = o;code = 111 char = r;code = 114 char = r;code = 114 char = h;code = 104 char = a;code = 97 char = g;code = 103 char = e;code = 101 char = .;code = 46 char = <;code = 60 char = b;code = 98 char = r;code = 114 char = /;code = 47 char = >;code = 62 result sql = Retinal hemorrhage occurred in 36% of 39 subjects exposed to altitudes at or above 14,200 feet. In subjects with a history of vascular headaches at sea level, there was a higher incidence of and more severe altitude headache, as well as a higher incidence of retinal hemorrhage than among those previously headache-free. In subjects without altitude headache, none had retinal hemorrhage. In subjects with altitude headache, 42% had retinal hemorrhage. A progressive rise in the incidence of retinal hemorrhage was correlated with progressively greater intensity of altitude headache. Factors that intensified the rate or degree of exposure, including rapid ascent and strenuous exertion, appeared to increase the likelihood of hemorrhage. An optimal balance between acclimatization and subsequent altitude stress appeared to prevent retinal hemorrhage. Increased retinal blood flow, retinal vessel engorgement, increased retinal vein and prevenous capillary pressure, and possibly decreased intraocular pressure may contribute to the pathogenesis of retinal hemorrhage.
Publication: Arch. Environ. Health 1975 May ;30(5)::217-21.
Publication Date: 1975 May
Study Author(s): Schumacher, G A;Petajan, J H;
Institution:
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Retinal hemorrhage occurred in 36% of 39 subjects exposed to altitudes at or above 14,200 feet. In subjects with a history of vascular headaches at sea level, there was a higher incidence of and more severe altitude headache, as well as a higher incidence of retinal hemorrhage than among those previously headache-free. In subjects without altitude headache, none had retinal hemorrhage. In subjects with altitude headache, 42% had retinal hemorrhage. A progressive rise in the incidence of retinal hemorrhage was correlated with progressively greater intensity of altitude headache. Factors that intensified the rate or degree of exposure, including rapid ascent and strenuous exertion, appeared to increase the likelihood of hemorrhage. An optimal balance between acclimatization and subsequent altitude stress appeared to prevent retinal hemorrhage. Increased retinal blood flow, retinal vessel engorgement, increased retinal vein and prevenous capillary pressure, and possibly decreased intraocular pressure may contribute to the pathogenesis of retinal hemorrhage.
PMID: 1130833